Rupicon 2014 caching

1?GJQ?AFGLE
JCV?LBPS*CQXCE
2MDRU?PC#CTCJMNCP/(3$'

3FGQGQ1?GJQ
FMUF?PBA?LGR@C
3 / 58

3FGQGQ1?GJQ
FMUF?PBA?LGR@C
% cache @user do %
%= render partial: 'user' %
% end %
4 / 58

3./(2
6'8
DP?EKCLRA?AFGLE
20+A?AFGLE
'33/?AFGLE
CVNGP?RGML
7 / 58

%P?EKCLR?AFGLE
cache small pieces of information instead of full pages
10 / 58

#MLMRCVNGPCICWQ
,MBCJ?QQMAG?RGMLQEMTCPLCVNGPW
-CQRCBA?AFGLEGQ@CQR
11 / 58

A?AFC=ICW
SQCP4QCPDGPQR
= User id: 1, updated_at: 2014-10-02 18:12:57
SQCPA?AFC=ICW
= users/1-20141002181257446781000
13 / 58

A?AFC=ICW
SQCP4QCPDGPQR
= User id: 1 , updated_at: 2014-10-02 18:12:57
SQCPA?AFC=ICW
= users/1-20141002181257446781000
14 / 58

% cache @user do %
% end %
15 / 58

% cache @user do %
% end %
%GPQRRGKCUCJM?BRFCN?EC
Read fragment views/users/1-20141002181257446781000/
95a652b13f0fc5b7bc8785ac31b6b8b9 (1.2ms)
Write fragment views/users/1-20141002181257446781000/
JJMRFCPN?ECJM?BQ
16 / 58

,MBCJ?QQMAG?RGMLQEMTCPLCVNGPW
17 / 58

class Project
has_many :todo_lists
class TodoList
belongs_to :project, touch: true
has_many :todos
class Todo
belongs_to :todo_list, touch: true
UFCLQMKCRFGLEAF?LECQ
GRQBGPCARN?PCLRGQ?JQMAF?LECB
18 / 58

- @projects.each do |project|
- cache ['project', project] do
...project
- project.todo_lists.each do |todo_list|
- cache ['todo_list', todo_list] do
...todo list
- todo_list.todos.each do |todo_list|
- cache ['todo', todo] do
...todo
UFCLQMKCRFGLEAF?LECQ
UCBMLRF?TCRMPCECLCP?RCRFCCLRGPC
N?EC
20 / 58

!CDMPC1?GJQ
- @projects.each do |project|
- cache ['v1', 'project', project] do
21 / 58

1?GJQQMJTCQRFGQNPM@JCKUGRFA?AFCBGECQRQ
A call to #cache in your views will now suffix a digest of the template and its
dependencies. No longer will you need to worry about fragment cache
dependencies and versioning!
user.cache_key
= users/1-20141002181257446781000
22 / 58

user.cache_key
= users/1-20141002181257446781000
23 / 58

user.cache_key
= users/1-20141002181257446781000
There's a gem for that
rails/cache_digests
24 / 58

/CPQNCARGTCB?R?
Or how to make your cache useless
28 / 58

MLQGBCPRFCGKN?ARMD?QGLEJC@SRRML
29 / 58

.col-sm-12.no-lr-padding.ticket-info
.col-price-block
%span.top-line
From
%span.ticket-price.bottom-line
= formated_cheapest_ticket_price(activity)
.col-tickets-left-block
- unless activity.hide_remaining_tickets?
%span.color-default.top-line
Tickets left:
%span.bottom-line
= activity_tickets_left(activity)
.col-attendees-block
%span.top-line
Attendees:
%span.bottom-line
= activity_attendees_count(activity)
.user-buttons-block
%a.btn.btn-wishlist.btn-85
%span.event_wishlist_span
= wishlisted_label(activity, current_user)
30 / 58

hit rate?
cache ['event', event] do
turns into:
cache ['event', event, current_user] do
Hit rate: 1 / Event.count * User.count
*probably should avoid
31 / 58

2MJSRGMLQ
,MTCGRAJGCLRQGBC
.event-pod{data-wishlisted=#{
wishlisted_label(activity, current_user)}}
$('.event-pod').each(function(){
$(this).find('.wishlisted_button').html(
$(this.data('wishlisted'))
);
})
???
This is good if you want to decouple the usere data or generate it in
Also good for edge caching.
*extra complexity
33 / 58

neighborland/cache_rocket
= render_cached 'outer', replace: 'inner'
outer.html.haml
- cache 'outer' do
.lots
.of
.htmls
= cache_replace_key 'inner'
inner.html.haml
= uncacheable_content
35 / 58

@CLCDGRQ
A?AFCKMPCQRSDD
more hits
faster pages
JCQQQRSDDGLA?AFC
more hits
less RAM used
37 / 58

3FCD?QRCQRAMBCGQLMAMBC
38 / 58

3FCD?QRCQRAMBCGQLMAMBC
+CTCP?ECRFC@PMUQCPA?AFC
39 / 58

def show
@article = Article.find(params[:id])
if stale?(:etag = @article, :last_modified
= @article.created_at.utc)
@statistics = @article.really_expensive_call
respond_to do |format|
# all the supported formats
end
end
end
40 / 58

def show
end
end
end
41 / 58

def show
end
end
end
= 304 Not Modified
42 / 58

$BECA?AFGLE
Cloudfront
Akamai
fastly
Varnish...
43 / 58

%MJJMURFCQCPSJCQ
CTCPWRFGLEAMKKMLGQQCPTCBGLRFCGLGRG?JPCOSCQR
NCPQNCARGTCB?R?BMLCUGRFHQGL?BGDDCPCLRFRRNPCOSCQR
CVNGP?RGMLGQF?LBJCB@W'33/FC?BCPQ
44 / 58

Cache-Control: public - Any cache can store a copy of the content.
Cache-Control: private - Don't store, this is for a single user.
Cache-Control: no-cache - Re-validate before serving this content.
Cache-Control: no-store - Don't store this content. Ever. At all. Please.
Cache-Control: public, max-age=[seconds] - Caches can store this content for n
seconds.
Cache-Control: s-maxage=[seconds] - Same as max-age but applies specifically
to proxy
45 / 58

class SuggestionsController
def show
@users = Rails.cache.fetch(['users', params['page']]) do
# we need to call .all to hit the database otherwise
# we cache only the ruby query object
User.suggestions.page(params['page']).all
end
end
end
*all is for rails3
47 / 58

3FCPCQ?ECKDMPRF?R
ahawkins/cashier
50 / 58

3?E@?QCBA?AFGLE
Instead of using updated_at to cause a cache miss, record where your objects
are cached
cache @something, tag: ['dashboard', 'settings']
@users = Rails.cache.fetch(['users', params['page']],
tag: 'users') do
# we need to call .all to hit the database otherwise
# we cache only the ruby query object
User.suggestions.page(params['page']).all
end
...
User#after_commit
...
Cashier.expire users
51 / 58

!SRGU?LRFMSPJWSNB?RCQMLKWFMKCN?EC

MFNJC?QCUGJJWMSFCJNKC
52 / 58

!SRGU?LRFMSPJWSNB?RCQMLKWFMKCN?EC

MFNJC?QCUGJJWMSFCJNKC
cache 'homepage', expires_in: 1.hour do
53 / 58

3FGQRFGLEBMCQLRSNB?RC
GU?LR?@SRRML
RMLSICCTCPWRFGLE
class NukesController
def create
expire_fragment('homepage');
end
end
54 / 58

'MUUCJJGQGRUMPIGLEDMPSQ
55 / 58

6FCPCRMEMDPMKFCPC
?AFGLEUGRF1?GJQ LMTCPTGCU
(BCLRGRW?AFC
,SJRGDCRAF%P?EKCLRQ
2CAMLB+CTCJ?AFC
56 / 58

Rupicon 2014 caching

Recomendados

Recomendados

Mais conteúdo relacionado

Semelhante a Rupicon 2014 caching

Semelhante a Rupicon 2014 caching (20)

Mais de rupicon

Mais de rupicon (6)

Último

Último (20)

Rupicon 2014 caching