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Postgres_9.0 vs MySQL_5.5
1.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 An EnterpriseDB White Paper For DBAs, Application Developers, and Enterprise Architects July 2011
2.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 2 Table of Contents Introduction ................................................................................................................................................................................................................................ 3 General Comparison Commentary ...................................................................................................................................................................................... 3 Core Database Features........................................................................................................................................................................................................ 5 Database Capacities ............................................................................................................................................................................................................... 8 Transaction Programming and Control .......................................................................................................................................................................... 9 Query Capabilities ................................................................................................................................................................................................................. 10 Business Intelligence and Data Warehousing ........................................................................................................................................................... 11 Network/Distributed Services ........................................................................................................................................................................................... 12 Bulk Data Management/Protection ................................................................................................................................................................................. 13 Security Features ................................................................................................................................................................................................................... 14 DBA Tools ................................................................................................................................................................................................................................. 15 Developer Tools...................................................................................................................................................................................................................... 16 Scalability Solutions ............................................................................................................................................................................................................. 17 High Availability Solutions................................................................................................................................................................................................. 18 Open Source Community.................................................................................................................................................................................................... 19 Conclusion................................................................................................................................................................................................................................ 20 About EnterpriseDB .............................................................................................................................................................................................................. 20 © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
3.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 3 Introduction This paper compares the PostgreSQL Community Server 9.0 and Postgres Plus Advanced Server 9.0 against MySQL 5.5. The comparison is broken down into the following sections with a short commentary following each section: • • • • • • • • • • • • • • General Comparison Commentary Core Database Features Database Capacities Transaction Management and Control Query Capabilities Business Intelligence / Data Warehousing Support Network/Distributed Services Bulk Data Management / Protection Security Features DBA Tools Developer Tools Scalability Solutions High Availability Solutions Open Source Community General Comparison Commentary The PostgreSQL based databases and accompanying software, in general, have a long and consistent history of providing enterprise grade mission critical features and performance based on the long-standing general purpose open source RDBMS PostgreSQL (pronounced ‘PostgreS-Q-L’). Postgres Plus Advanced Server show the benefits of what a truly open source community can provide in terms of features, quality, stability, and steady release progress without undue influence from any single commercial entity. MySQL has focused more on delivering ‘good enough and easy enough’ software for application developers in a Web 2.0 centric world, while PostgreSQL has concentrated on enterprise-class feature robustness, reliability, firm adherence to SQL standards (it supports 160/179 of the mandatory requirements of SQL:2008), a very strong security model, high degrees of programming flexibility, and overall excellent OLTP performance and scalability with minimal tuning and work-arounds being necessary. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
4.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 4 Because PostgreSQL is so feature rich, there is occasionally a wrong perception that says it must be difficult to use. In fact, just the opposite is true. While PostgreSQL is indeed a robust set of software, its features are cleanly implemented, thoroughly tested, standards compliant, and are extremely well documented. In other words, PostgreSQL ease-of-use factor is actually quite high. In addition, with Postgres Plus Advanced Server, those moving to PostgreSQL from Oracle will be immediately productive due to Advanced Server’s built-in Oracle compatibility. DBAs and developers can use existing Oracle code and continue to write new stored procedures and other database objects (e.g. functions, etc.) in native Oracle PL/SQL and run it against Postgres Plus Advanced Server. In addition, Postgres Plus Advanced Server offers Oracle data dictionary view compatibility, Oracle performance/wait interface objects, Oracle compatible utilities (e.g. SQL*Loader), SQL Profiler, and much more. In the end, for Oracle users, it is much easier to move to PostgreSQL than MySQL since they can concentrate on using their existing skills rather than learning new ones. When it comes to getting started, MySQL is trivial to initially install and set up, however, advanced configurations can easily be overly complex to implement due to MySQL’s lack of more sophisticated features and capabilities. With respect to installing and configuring PostgreSQL, today all Postgres Plus installations sport a straightforward graphical installer that includes an out-of-thebox tuning wizard, which smartly installs PostgreSQL taking into account available machine resources and the read/write usage pattern of the application. Of course, any PostgreSQL installation can be tuned after the fact as well via a number of fine grained configuration parameters that give DBAs and Developers complete control over database performance and behavior. All of these configuration options are well documented in Postgres Plus’ excellent documentation on the EnterpriseDB website. From an application perspective, MySQL is good for heavy website querying and the light to medium transaction loads experienced by many web companies and startups. Postgres Plus is best suited for applications that place a high premium on meeting highspeed/heavy traffic OLTP work. Such systems include Point Of Sale, Billing, and Operational Data Stores in various market segments such as Social Networking Websites, Enterprise 2.0 companies, and Financial based applications that experience heavy read AND write loads. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
5.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 5 Core Database Features Core Database Features Multi-Platform Support Pluggable Storage Engine Packaged Tuning Fully ACID Compliant ANSI Constraints Unicode support Schemas support Data Types PostgreSQL Lin32/64 Win Mac N Postgres Plus Adv. Server Lin32/64 Win Mac Solaris HPUX N Install Time Tuning DynaTune Y Y Y Y Numeric types: smallint integer bigint decimal numeric real double precision serial (autoincrement) bigserial (autoincrement) Monetary types: money Character types: varchar char text Binary Data types: bytea Data/Time types: timestamp (no timezone) timestamp (w/ timezone) date time (no timezone) time (w/ timezone) interval Y Y Y Y Numeric types: smallint integer bigint decimal numeric real double precision serial (autoincrement) bigserial (autoincrement) Monetary types: money Character types: varchar char text Binary Data types: bytea Data/Time types: timestamp (no timezone) timestamp (w/ timezone) date time (no timezone) time (w/ timezone) interval MySQL 5.5 Enterprise Linux32/64 Win Mac Solaris Unix (HP, AIX) Y Y Y Y Y N Numeric types: bit tinyint bool (tinyint) smallint mediumint int bigint serial float double float decimal Date types: date datetime timestamp time year String types: char varchar binary varbinary tinyblob © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com Comments MySQL Enterprise ships with the Enterprise Monitor and its performance advisors For MySQL, auto-increment is an attribute of integer or float types. Note: InnoDB permits storage of values that exceed the data range for a type. EnterpriseDB The Enterprise PostgreSQL Company
6.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Domain Constraints Exclusion Constraints Sequences Object Type support Inheritance User Defined Data Types LOB support General Index Types Clustered Indexes Boolean Type: boolean (t / f / unknown) Enumerated types Geometric types: point line lseg box path polygon circle Network Address types: cidr inet macaddr Bit String types: bit bit varying Text Search types: tsvector tsquery UUID type XML type Array types for all above Composite types Y Page 6 Boolean Type: boolean (t / f / unknown) Enumerated types Geometric types: point line lseg box path polygon circle Network Address types: cidr inet macaddr Bit String types: bit bit varying Text Search types: tsvector tsquery UUID type XML type Array types for all above Composite types Y tinytext blob text mediumblob mediumtext longblob longtext enum set N Y Y N Y Y Y Y Y b-tree (w/reverse) hash expression partial bitmap (in-memory only) GiST (replaces rtree) GIN Custom Y Y Y Y Y Y b-tree (w/reverse) hash expression partial bitmap (in-memory only) GiST (replaces rtree) GIN Custom Y Allow enforcement of complex conditions with a simple option to an ALTER TABLE command. N N N N Y b-tree hash rtree © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com Y EnterpriseDB The Enterprise PostgreSQL Company
7.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Function-based Indexes Y Page 7 Y N Spatial support only offered in MySQL’s nottransactional MyISAM engine InnoDB is index-organized in MySQL Spatial Index support Y Y Y Index Organized Tables N Y Y Primary Keys Y Y Y Foreign Keys Y Y Y Restrict Delete Set Null Y Y* No Limit Y Y Restrict Delete Set Null Y Y* No Limit Y N Range List Composite * Range List Composite Y Y with Read only Y Y Y with Read only Y Range List Hash Key Composite Y Only add column supported Y Y Y Y Cascaded Delete Read Only Views Updateable Views Max. Tables in Views Temporary Tables Un-logged Tables Data Partitioning Index Partitioning Online Alter Table Drop Column support Tablespaces Foreign keys only available in InnoDB and PBXT engines for MySQL Y Y Y 61 Y N * using Rules engine * PostgreSQL 9.1 due Summer 2011 * Constraint Exclusions Tablespaces only used for MySQL InnoDB and Cluster engines Core Database Features Commentary: In general Postgres Plus has a larger, more robust and mature set of database features evidenced by the extensive data type and indexing support. In addition, users can create their own data types for special needs. Postgres Plus also lends itself more readily to object oriented application programming techniques with features that include object type support and inheritance, which save time and provide additional integrity to the data and application. MySQL database features are more limited and narrow in scope primarily because of a focus on its application sweet spot of large web applications that don’t require the type of data integrity best addressed by features embedded in the core database. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
8.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 8 Database Capacities Database Capacities Postgres Plus Std. Server Postgres Plus Adv. Server MySQL 5.5 Enterprise CPU Cores Utilization Performant up to 32 Performant up to 32 4-? Max Table Size 32 TB 32 TB Max Row Size 1.6 TB 1.6 TB 250-1600 depending on type 1 GB (text, bytea) - stored inline or 2 GB (stored in pg_largeobject) 1 GB Unlimited -4713 5874897 63 250-1600 depending on type 1 GB (text, bytea) - stored inline or 2 GB (stored in pg_largeobject) 1 GB Unlimited -4713 5874897 63 64 TB 8000 bytes (excluding VARBINARY, VARCHAR, BLOB, or TEXT columns) InnoDB is limited to 1000 columns Max Columns / row Max Blob/Clob size Max CHAR size Max NUMBER size Min DATE value Max DATE value Max column name size Comments The InnoDB and Cluster storage engines can address more than 4 CPU’s/cores in MySQL, but all other engines cannot scale past 4. 4 GB (longtext, longblob) 64 KB 64 bits 1000 9999 64 Database Capacities Commentary: Except for the Maximum Table Size and the size limit for Blob/Clobs, Postgres Plus capacities are larger than MySQL. It is not uncommon for users of PostgreSQL or Postgres Plus to have database sizes in the terabyte range. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
9.
A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 9 Transaction Programming and Control Transaction Prog./Control Postgres Plus Std. Server Postgres Plus Adv. Server MySQL 5.5 Enterprise Crash recovery Y Y Y ACID transaction support Y Y Table based Column based Y Y Y Y Table based Column based Y Y Y Y Table based MVCC Y Y Y Row-level locking Y Y Y Y Y Unlimited Y Y Y Y Y Y Unlimited Y Y Y Y N Y 1023 Y Y Y Y Triggers Stored Functions/Procs Rules engine Nested Transactions Check Constraints Transactional DDL Cursors Concurrent Transaction Limit XA support Group commit Savepoint support Configurable checkpoints Y Y N N N Comments MySQL offers crash recovery in the InnoDB and Cluster storage engines, however overall server crash recovery can be a problem with MyISAM tables and the underlying MySQL data dictionary, which is MyISAM-based InnoDB and Cluster offer ACID support A query re-write facility. MVCC is only available in the InnoDB and PBXT storage engines in MySQL Row locks are found in InnoDB; page locking is used in most other MySQL engines Rollback of DDL changes. Transaction Programming Control Commentary: Postgres Plus has an edge over MySQL in various areas of transaction management and control. Postgres Plus has column based triggers, a rules engine, and nested transactions which give application developers and DBA’s a wealth of options for attacking complex OLTP issues in the database. DDL in Postgres Plus is also transactional, meaning you can roll back schema changes while the database is online; such capabilities do not exist in MySQL. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 10 Query Capabilities Query Capabilities Full Text Search Recursive Queries Query Optimization Hints Query Analyzer/monitor Join Limit per Query Postgres Plus Std. Server Y Y N N Unlimited Nested-Loop Merge-Join Hash-Join Unlimited Y Postgres Plus Adv. Server Y Y Y Y Unlimited Nested-Loop Merge-Join Hash-Join Unlimited Y MySQL 5.5 Enterprise Y N Y Y 61 Nested-Loop Merge-Join Rules engine Y Y N Graphical Query Designer Case insensitivity supported Correlated Sub-queries Y Y Y Y Y Y Y Y Y Plan Join types Indexes usable per query Cost based optimizer Comments MyISAM supports full text 61 Y Allows re-writing queries to more efficient forms. Query Capabilities Commentary: In general, the Postgres Plus query capabilities have some advantages over MySQL. They include a recursive query option (which can be extremely effective), and a wide variety of join types available to the PostgreSQL Query Planner. This last point is worth noting, as it is not evident from the table why PostgreSQL does not support explicit query hints or supply a query analyzer. The reason those features are absent (they are in Postgres Plus Advanced Server but this is a consequence of the Oracle compatibility) is that the PostgreSQL Query Planner is extremely efficient, has many join types at its disposal, and even includes features to remove unnecessary joins before execution. Finally, the PostgreSQL Rules system (or more precisely speaking, the query rewrite rule system) provides a powerful and flexible tool for DBAs and application developers. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 11 Business Intelligence and Data Warehousing BI/Data Warehousing Bitmap Index Joins Summary Tables Aggregate functions Windowing functions Common Table Expressions Direct path load API Expression-based Indexes PostgreSQL Y Y Y Y Y Y Y Emulated with Stored Procedures/Triggers Postgres Plus Adv. Server Y Y Y Y Y Y Y Emulated with Stored Procedures MySQL 5.5 Enterprise N N Y N N Y N Heterogeneous datasources Y Y N External tables Union Intersect Except Inner Joins Outer Joins Inner Selects Merge Joins N Y Y Y Y Y Y Y N Y Y Y Y Y Y Y Y Y N N Y Y Y Y Materialized views Comments N Parallel Query Y* Y* Y* Optimizer statistics mgmt Set returning functions Sample Query scan Y Y Y Y Y Y Y Y Y Allows querying external data formats as a table. * with GridSQL for PostgreSQL and third-party storage engine vendors for MySQL Use SETOF function EXPLAIN Business Intelligence and Data Warehousing Commentary: Postgres Plus contains many critical database features that are used in data warehousing applications. MySQL generally uses the MyISAM storage engine which is well suited for small data warehousing applications but requires third-party storage vendors to tackle any large data volumes. It is also worth noting that the heterogeneous datasource support (viaSQL/MED) in PostgreSQL can be particularly interesting as it allows data in external formats including NoSQL databases to be integrated into an ACID based transactional PostgreSQL system. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 12 Network/Distributed Services Network/Distributed Services Connection Management Connection Pooling Distributed Federated Queries Parallel Query Distributed Memory Caching Distributed Transactions using 2 Phase Commit Native Database Links Heterogeneous DB Links PostgreSQL pg_pool II for multi-node, PgBouncer for single node Y Postgres Plus Adv. Server pg_pool II for multi-node, PgBouncer for single node Y MySQL 5.5 Enterprise Comments Built-in Y The Federated storage engine for MySQL was discontinued as a production-ready engine in 5.1 and above N Y N N Y (memcached) N Y (InfiniteCache) With 3 party vendors Y (memcached) Y Y Y Y N Y Y N N rd Network/Distributed Services Commentary: MySQL introduced the Federated storage engine in MySQL 5.0, which was designed to handle federated SQL statements between different physical MySQL Servers. The Federated storage engine was relegated back to beta quality in MySQL 5.1 and above, is not enabled by default, and is not being actively worked at the time of this writing. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 13 Bulk Data Management/Protection Bulk Data Mgt/Protection Array-INSERT based Loader High Speed Bulk Data Loader PostgreSQL Y N MySQL Oracle SQL Server Sybase Y Y Postgres Plus Adv. Server Y Y* MySQL Oracle SQL Server Sybase Y Y MySQL 5.5 Enterprise Y N Online Backup Y Y Y Online Recovery Parallel Recovery Point-In-Time Recovery Roll Forward Recovery Incremental Backup via backup command Incremental Backup via Logging Y Y Y Y Y Y Y Y N N Y Y N N N Y Y Y Y Y Y Migration Tools Online Reorganization Hot Standby Database Compressed Backups Comments *includes parallel load Obsoleted/EOL’d N Y Some restrictions apply with MySQL such as no DML/DLL activity, etc. MySQL/InnoDB Hot backup required Bulk Data Mgt/Protection Commentary: Both MySQL and Postgres Plus possess the requisite backup and restore options expected in an RDBMS. However, in the move to MySQL Workbench, the MySQL Migration Toolkit has been dropped by Oracle so MySQL currently lacks the migration tools offered by EnterpriseDB for PostgreSQL. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 14 Security Features Security Features Integration with OS Security Password Management Role based security Groups support Grant Privileges Deny Privileges Encryption Options Pluggable Authentication Methods Column Level Permissions Built-in SQL Injection prevention Obfuscation for Server side code objects (e.g. stored procedures, etc.) Built-in Auditing Grant/Revoke in Schemas PostgreSQL Postgres Plus Adv. Server MySQL 5.5 Enterprise Y Y N Y Y Y Y Y Password-MD5 Column Encryption Partition Encryption Network Passwords-Double MD5 Encrypted Network Data – SSL Client Encryption Trust Password GSSAPI SSPI Kerberos Identity based LDAP SSL PAM RADIUS Y Y Y Y Y Y Password-MD5 Column Encryption Partition Encryption Network Passwords-Double MD5 Encrypted Network Data – SSL Client Encryption Trust Password GSSAPI SSPI Kerberos Identity based LDAP SSL PAM RADIUS Y Y N N Y N N* Y N Y Y N N Y N Y Y ? Comments MySQL Cluster 7.0 can interact with LDAP directories Password – Hash Data Encryption Network Data – SSL Password Y *available through subscription Supports mass permissions changes for easier administration. Security Features Commentary: © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 15 Security is one of the areas offering the clearest differences between Postgres Plus and MySQL. Security has always been a major focus of PostgreSQL, which possesses an arsenal of tools and options for securing data and accesses to the database. The security distinction is an especially important one as databases become more pervasive in cloud deployments and virtualized environments where hardware infrastructure is being shared, often times with people external to your organization. EnterpriseDB’s recent introduction of SQL/Protect to prevent SQL Injection attacks at the database layer is just another example of the community’s commitment to protecting PostgreSQL data and databases. DBA Tools DBA Tools Integrated One-click installer Package Manager for addon modules Automatic Update Service Update Monitor Technical Alerts Easy (in-place) version upgrades PostgreSQL Y Postgres Plus Adv. Server Y MySQL 5.5 Enterprise N Y Y N Y Y Y Y Y Y Y Y Y N Y N Y Administration Schema Object Browser SQL Syntax Highlighting Connection/Instance Mgt Log Viewer SQL Development Database Modeling* Replication Management Forward / Reverse Engineer Wizards/Dialogs Custom Plug-in support Y Administration Schema Object Browser SQL Syntax Highlighting Connection/Instance Mgt Log Viewer SQL Development Database Modeling* Replication Management Forward / Reverse Engineer Wizards/Dialogs Custom Plug-in support Diagnostics Functions Wait-based interface Diagnostics GUI Tools Index Advisor Metering, Monitoring, Alerts Y N N N Y Y Y N Y Y Y Administration Schema Object Browser SQL Syntax Highlighting Connection/Instance Mgt Log Viewer SQL Development SSH Connection Tunnel Database Modeling Replication Management Forward / Reverse Engineer Wizards/Dialogs Custom Plug-in support Y Y Y Y Y Replication Console N* Y** N Integrated Admin Console © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com Comments rd * 3 Party tools *included with Subscription **supports Oracle and SQL Server replication EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Migration Console N Page 16 Y N DBA Tools Commentary: Both Postgres Plus and MySQL offer automatic software maintenance and technical alerts for DBAs to keep their systems up to date. Both offer robust and mature administration consoles for managing the database, sophisticated monitoring tools for keeping tabs on the database’s health, and both contain various tools for diagnostic with the exception of a graphical diagnostic tool for Postgres Plus. For those organizations though in need of sophisticated auditing and reporting, the fine grained audit logging offered in Postgres Plus Advanced Server meets those needs more adequately than MySQL. Developer Tools Developer Functionality Integrated Devel. Console PostgreSQL Y Object Management Visual Query Postgres Plus Adv. Server Y Object Management Visual Query ODBC JDBC .NET C++ ECPG ©(C) OCI Java Perl Python Ruby Tcl C/C++ PL/pgSQL PL/SQL MySQL 5.5 Enterprise Y Color syntax highlighting Visual Query ODBC JDBC .NET C C++ Open Office Y Y N Y Y Y Y N N Y Y N Y Y N Java Java Java Client Connectors ODBC JDBC .NET C++ ECPG © Built-in Procedural Languages Java Perl Python Ruby Tcl C/C++ PL/pgSQL Procedural Language Debugger Code Profiler Server side debugger Debugging support for triggers Procedural Language obfuscation Library Interfaces Comments SQL/PSM © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Built In Packages User Defined Packages Create Function support Custom aggregate functions Server Side programming Graphical Explain tool Embedded database library Listen/Notify functions ODBC Perl Python Ruby C, C++ PHP Lisp Scheme Qt N N Y Yes, in any language Stable and Mature Y N Y Page 17 ODBC Perl Python Ruby C, C++ PHP Lisp Scheme Qt Y Y Y Yes, in any language Stable and Mature Y N Y MySQL embedded Perl Python Ruby C, C++ PHP Tcl N N Y Yes, C only Recently added Y Y N Developer Tools Commentary: Both Postgres Plus and MySQL have extensive connector and library interface support for developers including an integrated development console for creating and writing code. However, Postgres Plus offers developers multiple language choices for their procedural language as well for Stored Procedures and Triggers, while MySQL offers only their own SQL/PSM, which has not been updated in over 5 years. Also worth noting is the server side trigger and procedural language debugger which are available in PostgreSQL but absent in MySQL. In addition, Postgres Plus Advanced Server Oracle compatibility offers many features that are extensively used today but don’t require the use of Oracle or an Oracle skill set. For instance, there are many features like built-in packages of functions and the ability to create custom packages that support object oriented programming efforts. This provides a positive growth path and increased capabilities for developers as their applications grow and require more sophisticated features. For ISV’s however, MySQL does offer an embedded database option while PostgreSQL does not offer a slimmed down embedded database option applicable for multiple devices and specialized application needs. Scalability Solutions Scalability Solutions PostgreSQL Postgres Plus Adv. Server Horizontal Scalability Replication Replication Excellent Core Use (32-64) Excellent Core Use (32-64) Vertical Scalability MySQL 5.5 Enterprise Replication or via third party storage engines Depends on engine © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com Comments InnoDB and Cluster can use more than 4 CPU’s/cores; all other engines cannot scale EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 18 past 4 Scalability Solutions Commentary: MySQL scales out horizontally via replication and also makes use of memcached, a caching utility long used in the PostgreSQL community. GridSQL with Postgres Plus provides near linear scalability for partitioned data across commodity hardware and provides parallel query capability for extremely fast response times in data warehousing type applications. Infinite Cache in Postgres Plus Advanced Server has proven to be multiple times faster than community PostgreSQL in read-mostly and read-write applications and can store entire multi-gigabyte databases in memory utilizing compression for lightning fast database-in-memory performance. High Availability Solutions High Availability Solutions PostgreSQL Built-in streaming replication Slony SteelEye Bucardo Londiste 9.1 Y Y Bucardo Postgres Plus Adv. Server Built-in streaming replication Slony SteelEye Bucardo Londiste 9.1 Y Y Bucardo MySQL 5.5 Enterprise Logical and physical standby database Y* Y* Y Fast start fault recovery Y* Y* N Backup and recovery Y* Y* Y (requires InnoDB Hot Backup) RedHat Cluster Veritas Cluster LinuxHA RedHat Cluster Veritas Cluster LinuxHA MySQL Cluster Replication Synchronous Oracle Replication SQL Server Replication Multi-Master Replication Clustering Comments * native replication as well rd as 3 party tools Y Semi-synchronous N N Y * PPAS has physical standby. Logical Standby in 9.0 release * can adjust checkpoint_interval for flushing buffers to disk * Online/hot backups supported as well as PITR High Availability Solutions Commentary: © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 19 PostgreSQL and Postgres Plus now have integrated replication, a long awaited feature which includes streaming replication and hotstandby capabilities. Postgres Plus has traditionally leaned on a variety of excellent 3rd party replication and High Availability products which are also still available. MySQL Cluster is an excellent solution for telecommunication-style applications. Open Source Community Open Source Community License Type Community Type Community Size Leadership Total Development History PostgreSQL PostgreSQL License (similar to BSD) Postgres Plus Adv. Server MySQL 5.5 Enterprise Proprietary GPLv2 True open source Open Source Based Controlled by Oracle, but does accept patches from the community Same as PostgreSQL plus additional developers employed by EnterpriseDB. Unknown Long Term Stability 5 (21) Various forks 15 years Core Team 7 Major Contributors 25 Contributors 39 Committers 19 Hackers List 1800+ General Mail List 3,800+ Announce List 31,000+ Long Term Stability 21 years Comments PostgreSQL numbers based on v9.0 Open Source Community Commentary: PostgreSQL always has been and still remains a true open source database. It is not controlled by any single commercial entity. Community members can suggest, create, submit, and have features accepted without interference or delay from a commercial entity. The active community is large and vibrant and under consistently stable leadership since the beginning of the project producing high quality releases in terms of features and stability. EnterpriseDB has a very positive relationship with the community on many fronts including technical and marketing relationships. MySQL’s community leadership has fractured and splintered into multiple other open source projects. © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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A Comparison of
PostgreSQL 9.0 and MySQL 5.5 Page 20 Conclusion At EnterpriseDB we understand that adopting a new open source database is not a trivial task. You have lots of questions needing answers, schedules to keep, and processes to follow. EnterpriseDB has helped thousands of organizations like yours investigate, evaluate, prove, develop, and deploy their open source solutions. To make your work easier and faster we have special selfservice sections of our website dedicated to assisting you each step of the way. Just getting started? Visit: http://www.enterprisedb.com/solutions/getting-started-postgresql Conducting an evaluation? Visit: http://www.enterprisedb.com/solutions/postgresql-evaluations Already developing with Postgre? Visit: http://www.enterprisedb.com/solutions/postgresql-development Deploying a PostgreSQL based application? Visit: http://www.enterprisedb.com/solutions/postgresql-deployment Or for an in depth discussion targeted specifically to your organization’s requirements and questions send an email to sales@enterprisedb.com or call +1 781-357-3390 or 1-877-377-4352 (US Only) to schedule an appointment with an EnterpriseDB domain expert. About EnterpriseDB EnterpriseDB is the leading provider of enterprise class products and services based on PostgreSQL, the world's most advanced open source database. The company's Postgres Plus products are ideally suited for transaction-intensive applications requiring superior performance, massive scalability, and compatibility with proprietary database products. Postgres Plus products provide an economical open source alternative or complement to proprietary databases without sacrificing features or quality. EnterpriseDB has offices in North America, Europe, Japan, and India. The company was founded in 2004 and is headquartered in Bedford, MA. For more information, please visit http://www.enterprisedb.com . © Copyright 2011 EnterpriseDB Corporation. All rights reserved. EnterpriseDB and Postgres Plus are trademarks of EnterpriseDB Corporation. Other names may be trademarks of their respective owners. http://www.enterprisedb.com EnterpriseDB The Enterprise PostgreSQL Company
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