如何解决引导轨道应用程序的内存膨胀问题？ [英] How to troubleshoot memory bloat at boot for rails app?
本文介绍了如何解决引导轨道应用程序的内存膨胀问题？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我在运行ruby 2.3.3和Rails 4.1.13的Heroku上遇到Rails应用程序的内存问题。当我在Heroku上加载应用程序时，它的启动速度约为430 Mb，但在那里非常稳定 - 但在Heroku上仍然达到512 Mb（如预期的那样）。我的主要问题是：如何在我的应用程序的BOOT期间精确定位和减少内存使用量？即如何减少启动时使用的内存量？
<我已经看过大多数宝石，例如出轨，oink，内存分析器和stackprof，但是最能帮助我的是Scout插件，用于查找内存膨胀和内存饥饿的控制器等。通过这些，我设法减少了应用程序的数量在内存方面增长，但不是在启动时使用多少内存。
我知道gem是在启动时加载的，而且越多，越大，gem就是启动时使用的内存越多。运行 bundle exec derailed bundle：mem 给了我：
TOP： 92.3008 MiB
carrierwave-aws：16.7461 MiB
carrierwave / storage / aws：16.6094 MiB
aws-sdk-core / s3：7.9414 MiB
aws-sdk-resources：2.5703 MiB
aws-sdk-core：2.5117 MiB
jmespath：1.8867 MiB
jmespath / nodes：1.1406 MiB
jmespath / nodes / function：0.3867 MiB
seahorse / client / base：0.9414 MiB
seahorse / client / plugins / net_http：0.5273 MiB
aws-sdk-core / xml / parser / engines / rexml：0.8633 MiB
rexml / document：0.8516 MiB
rexml / element：0.5508 MiB
rails / all：13.6992 MiB
rails：8.9453 MiB（还需要：active_record / railtie，active_model / railtie和另外6个）
rails / application ：7.2188 MiB
导轨/发动机：6.8672 MiB（还需要：咖啡/导轨/发动机）
导轨/拉力杆：6.5898 MiB（也需要通过：sprockets / railtie，jbuilder / railtie）
rails / configuration：6.3398 MiB（也需要：rails / railtie / configuration）
active_support / core_ext / object：6.0586 MiB
active_support / core_ext / object /转换：4.7227 MiB
active_support / core_ext / hash /转换：4.0039 MiB（也是必需的：active_support / core_ext / hash，active_record / serializers / xml_serializer）
active_support / time：3.8008 MiB必需的：active_record / base）
active_support / core_ext / time：3.0938 MiB
active_support / core_ext / time / calculation：2.9922 MiB（同时还需要active_support / core_ext / numeric / time，active_support / core_ext /字符串/转换）
active_support / core_ext / time / conversions：2.2148 MiB（也是必需的：active_support / core_ext / time，active_support / core_ext / date_time /转换）
active_support / values / time_zone：2.1602 MiB（另请参见：active_support / time_with_zone，active_support / core_ext / date_time / conversions）
tzinfo：1.8984 MiB
active_support / core_ext / array / conversions：0.6211 MiB通过：active_support / duration，action_dispatch / http / request和另外2个）
active_support / xml_mini：0.5508 MiB（也是必需的：active_support / core_ext / hash /转换）
active_support / core_ext / object / json ：1.0352 MiB（也被active_support / json / encoding所要求）
json：0.7227 MiB（也被active_support / json / decode，pg / text_encoder和其他19个人需求）
json / common：0.3906 MiB（也是必需的：json / ext）
active_support：0.7109 MiB（也是必需的：active_support / time，active_support / railtie和另外5个）
active_support / dependencies / autoload：0.332 MiB通过： rails，active_support / rails）
active_support / inflector / methods：0.332 MiB（active_support / core_ext / string / inflections，active_support / core_ext / time / conversions和另外5个必需项）
active_support / inflections ：0.3164 MiB（同时需求者：active_support / inflector）
active_support / logger：0.3281 MiB
action_dispatch / railtie：0.668 MiB（同时需求：action_controller / railtie）
action_dispatch：0.6289 MiB另请参见：action_controller）
active_support / rails：0.4414 MiB（也需要：active_record，active_model和另外4个）
active_support / deprecation：0.418 MiB（sass / rails / helpers， formtastic / deprecation）
active_record / railtie：2.8555 MiB
active_record：1.9766 MiB（也是必需的：friendly_id）
active_record / connection_adapters / abstract_adapter：0.8516 MiB
arel：0.8086 MiB还需要：active_re
arel / visitor：0.3438 MiB
action_controller / railtie：0.875 MiB（同时需要：rails / all，sprockets / railtie）
action_controller：0.6797 MiB
链轮/导轨/助手：0.918 MiB $
action_view / helpers：0.8945 MiB（也是必需的：action_view / base）
action_view / helpers / form_helper：0.3828 MiB（同样需求：action_view / helpers / form_options_helper）
链轮：0.9102 MiB此外，还需要：链轮/导轨/助手）
链轮/指令处理器：0.5586 MiB
yaml：0.5078 MiB（也需要：active_support / ordered_hash，hirb和其他7个）
psych：0.5078 MiB
rails3-jquery-autocomplete：9.9102 MiB
action_controller / base：8.4922 MiB
a ction_controller / metal：1.8281 MiB
abstract_controller / base：1.0898 MiB
erubis：0.8477 MiB（同样需求：action_view / template / handlers / erb，heroics）
erubis / engine：0.4063 MiB
action_dispatch / middleware / stack：0.6367 MiB
active_support / dependencies：0.5703 MiB（也是必需的：abstract_controller / helpers，active_record / base）
abstract_controller /渲染：1.5625 MiB
action_view / view_paths：1.4531 MiB
action_view / view_paths：1.4531 MiB
action_view / base：1.3477 MiB
action_view / lookup_context：0.5156 MiB
action_view /模板：0.3789 MiB（同时需求：action_view / template / resolver）
action_controller / metal / redirecting：1.0586 MiB
action_controller / metal / rack_delegation：0.9297 MiB
action_dispatch / http / request：0.8555 MiB
action_controller / me tal / request_forgery_protection：0.5859 MiB
action_controller / metal / params_wrapper：0.5 MiB
action_dispatch / http / mime_type：0.375 MiB（也是必需的：abstract_controller / collector，jbuilder / jbuilder_template）
action_controller / metal / url_for：0.3008 MiB
rails3-jquery-autocomplete / formtastic：1.2578 MiB
formtastic / inputs / base：0.8125 MiB
fog：8.6523 MiB
fog / vcloud_director：1.0156 MiB
fog / vcloud_director / compute：0.9961 MiB
fog / vcloud_director / query：0.4453 MiB
pp：0.418 MiB（同时需求：scout_apm）
fog / openstack：0.8398 MiB
fog / cloudstack：0.5859 MiB
fog / cloudstack / compute：0.5859 MiB
fog / internet_archive：0.543 MiB
fog / internet_archive / storage：0.5352 MiB
fog / internet_archive / core：0.3125 MiB
fog / rackspace：0.3867 MiB
fog / cloudsigma：0.3594 MiB
fog / cloudsigma / compute：0.3047 MiB
fog / vcloud：0.3203 MiB
fog / vcloud / compute：0.3125 MiB
fog / aws：0.3125 MiB
twitter：8.3711 MiB
addressable / uri：4.2422 MiB需求：twitter / base，twitter / rest / request和其他8个）
addressable / idna：2.7891 MiB
addressable / idna / pure：2.7461 MiB
public_suffix：0.3242 MiB
twitter / streaming / client：1.7266 MiB
twitter / streaming / response：1.4453 MiB
http：1.418 MiB
http / response：1.2109 MiB
http / cookie_jar：0.9219 MiB
http / cookie：0.9102 MiB
domain_name：0.8203 MiB
domain_name / etld_data：0.7813 MiB
twitter / configuration：0.8477 MiB（同时需求：twitter / rest / help）
twitter / base：0.6016 MiB（还需要：twitter / entity，twitter / identity和其他12个）
twitter / null_object：0.4688 MiB（也需要：twitter / trend_results）
naught：0.4063 MiB
twitter / cursor：0.8164 MiB（还需要：twitter / rest / utils，twitter / rest / friends_and_followers和另外2人）
twitter / rest / request：0.7852 MiB通过：twitter / rest / utils，twitter / rest / friends_and_followers和其他8个）
faraday：0.6406 MiB（也需要：twitter / rest / client，twitter / rest / response / parse_json和另外6人）
twitter / rest / client：0.418 MiB
twitter / rest / api：0.3828 MiB
asset_sync：4.9609 MiB
asset_sync / multi_mime：4.5039 MiB
mime / types：4.4883 MiB（也是必需的：mime / types / columnar）
mime / types / registry：4.1914 MiB
asset_sync / storage：0.4375 MiB
雾/核心：0.4063 MiB ，fog / xml和其他48个）
platform-api：4.5273 MiB
platform-api / client：2.8359 MiB
newrelic_rpm：3.875 MiB
new_relic / control：3.875 MiB
new_relic / agent：3.4883 MiB
new_relic / agent / agent：1.7422 MiB
new_relic / agent / configuration / manager：0.4961 MiB（也是new_relic / agent / configuration所必需的）
new_relic / agent / configuration / default_source：0.3633 MiB
new_relic / agent / transaction_sampler：0.3516 MiB
carrierwave：2.8281 MiB（同时必备：carrierwave-aws）
carrierwave /上传者：1.7656 MiB
friendly_id：2.5273 MiB
friendly_id / object_utils：2.4453 MiB
active_record / base：2.4258 MiB
active_record / query：0.3906 MiB
指南针：2.1328 MiB（同时需求：compass-rails）
指南针/ sass_extensions：1.2461 MiB
指南针/ sass_extensions / sprites：0.6875 MiB
指南针/ sass_extensions / sprites /引擎：0.4609 MiB
指南针/ sass_extensions / sprites / engines / chunky_png_engine：0.4492 MiB
chunky_png：0.4492 MiB
compass / sass_extensions / functions：0.5078 MiB
指南针/配置：0.6172 MiB
指南针/配置/数据：0.6133 MiB
pg：2.1055 MiB
pg_ext：1.9102 MiB
feedjira：2.0781 MiB
丝瓜络：0.625 MiB
sax-machine：0.4414 MiB
sass-rails：1.8047 MiB
sass / rails：1.8008 MiB
sass / rails / helpers：1.7578 MiB
链轮/ sass_functions：1.7383 MiB
sass：1.7383 MiB （也需要：sass / rails / importer，sprockets / sass_importer）
sass / engine：1.4492 MiB
sass /脚本：0.5586 MiB（sass / script / css_parser也需要）
sass / scss：0.3281 MiB
sass / scss / parser：0.3047 MiB
scout_apm：1.418 MiB
webrick：0.5664 MiB
jbuilder：1.1016 MiB（也需要：jbuilder / jbuilder_template ）
active_support / cache：0.3906 MiB
rmagick：1.0234 MiB
rmagick_internal.rb：1.0195 MiB
RMagick2.so：0.6875 MiB
lazyload-rails：0.8555 MiB
nokogiri：0.8555 MiB（另外需求：TOP，sax-machine / handlers / sax_nokogiri_handler和另外5人）
sitemap_generator：0.5195 MiB
dalli：0.4648 MiB
独角兽：0.457 MiB
hirb：0.3984 MiB
我认为92 Mb在宝石方面相当不错，但我确实在应用中使用了它们。 Carrierwave是最大的，但在我如何在AWS（以及Fog）等缓存图像时非常重要。这只占启动时使用的内存的大约1/4。
在我的应用程序控制器中，我有一个before过滤器，用于加载整个网站（在全局标题，侧边栏等），像这样：
@search = TextSearch.new
@administrator_logged_in = current_administrator
@nbr_of_stores_total = Store.active.size＃用于标题
@nbr_of_blog_posts_total = BlogPost.once_posted.size＃用于标题
contests_open = Contest.active.open.size
@ active_contests_string = contests_open> 0？ （<<<<<<<<<<<<<<<<"：
add_breadcrumbHome，root_path
@open_graph_image =https：//s3.eu-central-1。 amazonaws.com/myapp/assets/myapp_logo_large.png
＃与季节相关的
@is_christmas = false
@gift_word_seasonal =圣诞礼物
我可以想象这会被加载到启动（和整体）内存中，对吗？
在哪里，以及如何查找启动内存使用情况？简而言之：
-
在我的rails应用程序中，我应该如何启动内存（如中间件，初始化器等）？
-
我可以使用哪些工具（例如上面的脱轨命令）来查找/确定内存饥饿的调用/操作？
-
我无法找到导致我的故障排除操作的直接原因和影响。比如，找到如果我删除这些代码，我可以保存多少内存？的答案。我应该如何测量/比较我在应用中执行的任何操作（而不是上传并检查图中的整体使用情况）？
解决方案
尝试运行GC.stat命令
这将提供应用程序中的内存使用情况和垃圾回收信息，您可以根据这些信息来决定。
执行内存分析
https://github.com/ice799/ memprof 也可能对你有帮助
I am having memory issues with a Rails app on Heroku running ruby 2.3.3 and Rails 4.1.13. When I load the app on Heroku it starts at around 430 Mb but is quite stable there - but still reached 512 Mb on Heroku (as would be expected). My main question is: How do I pinpoint and reduce memory usage during BOOT on my app? I.e. how do I reduce the amount of memory used at startup?
I have looked into most gems, e.g. derailed, oink, memory profiler, and stackprof but what has helped me the most has been Scout add-on on Heroku in terms of finding memory bloats and memory hungry controllers etc. Through this I have managed to reduce the amount the application grows in terms of memory but not so much how much memory it uses at startup.
I know gems are loaded on startup and the more, and larger, the gems are the more memory is used at startup. Running bundle exec derailed bundle:mem gives me this:
TOP: 92.3008 MiB
carrierwave-aws: 16.7461 MiB
carrierwave/storage/aws: 16.6094 MiB
aws-sdk-core/s3: 7.9414 MiB
aws-sdk-resources: 2.5703 MiB
aws-sdk-core: 2.5117 MiB
jmespath: 1.8867 MiB
jmespath/nodes: 1.1406 MiB
jmespath/nodes/function: 0.3867 MiB
seahorse/client/base: 0.9414 MiB
seahorse/client/plugins/net_http: 0.5273 MiB
aws-sdk-core/xml/parser/engines/rexml: 0.8633 MiB
rexml/document: 0.8516 MiB
rexml/element: 0.5508 MiB
rails/all: 13.6992 MiB
rails: 8.9453 MiB (Also required by: active_record/railtie, active_model/railtie, and 6 others)
rails/application: 7.2188 MiB
rails/engine: 6.8672 MiB (Also required by: coffee/rails/engine)
rails/railtie: 6.5898 MiB (Also required by: sprockets/railtie, jbuilder/railtie)
rails/configuration: 6.3398 MiB (Also required by: rails/railtie/configuration)
active_support/core_ext/object: 6.0586 MiB
active_support/core_ext/object/conversions: 4.7227 MiB
active_support/core_ext/hash/conversions: 4.0039 MiB (Also required by: active_support/core_ext/hash, active_record/serializers/xml_serializer)
active_support/time: 3.8008 MiB (Also required by: active_record/base)
active_support/core_ext/time: 3.0938 MiB
active_support/core_ext/time/calculations: 2.9922 MiB (Also required by: active_support/core_ext/numeric/time, active_support/core_ext/string/conversions)
active_support/core_ext/time/conversions: 2.2148 MiB (Also required by: active_support/core_ext/time, active_support/core_ext/date_time/conversions)
active_support/values/time_zone: 2.1602 MiB (Also required by: active_support/time_with_zone, active_support/core_ext/date_time/conversions)
tzinfo: 1.8984 MiB
active_support/core_ext/array/conversions: 0.6211 MiB (Also required by: active_support/duration, action_dispatch/http/request, and 2 others)
active_support/xml_mini: 0.5508 MiB (Also required by: active_support/core_ext/hash/conversions)
active_support/core_ext/object/json: 1.0352 MiB (Also required by: active_support/json/encoding)
json: 0.7227 MiB (Also required by: active_support/json/decoding, pg/text_encoder, and 19 others)
json/common: 0.3906 MiB (Also required by: json/ext)
active_support: 0.7109 MiB (Also required by: active_support/time, active_support/railtie, and 5 others)
active_support/dependencies/autoload: 0.332 MiB (Also required by: rails, active_support/rails)
active_support/inflector/methods: 0.332 MiB (Also required by: active_support/core_ext/string/inflections, active_support/core_ext/time/conversions, and 5 others)
active_support/inflections: 0.3164 MiB (Also required by: active_support/inflector)
active_support/logger: 0.3281 MiB
action_dispatch/railtie: 0.668 MiB (Also required by: action_controller/railtie)
action_dispatch: 0.6289 MiB (Also required by: action_controller)
active_support/rails: 0.4414 MiB (Also required by: active_record, active_model, and 4 others)
active_support/deprecation: 0.418 MiB (Also required by: sass/rails/helpers, formtastic/deprecation)
active_record/railtie: 2.8555 MiB
active_record: 1.9766 MiB (Also required by: friendly_id)
active_record/connection_adapters/abstract_adapter: 0.8516 MiB
arel: 0.8086 MiB (Also required by: active_record/base)
arel/visitors: 0.3438 MiB
action_controller/railtie: 0.875 MiB (Also required by: rails/all, sprockets/railtie)
action_controller: 0.6797 MiB (Also required by: heroku_rails_deflate/serve_zipped_assets)
action_controller/metal/live: 0.332 MiB
sprockets/railtie: 1.8516 MiB (Also required by: sass/rails/railtie)
sprockets/rails/helper: 0.918 MiB
action_view/helpers: 0.8945 MiB (Also required by: action_view/base)
action_view/helpers/form_helper: 0.3828 MiB (Also required by: action_view/helpers/form_options_helper)
sprockets: 0.9102 MiB (Also required by: sprockets/rails/helper)
sprockets/directive_processor: 0.5586 MiB
yaml: 0.5078 MiB (Also required by: active_support/ordered_hash, hirb, and 7 others)
psych: 0.5078 MiB
rails3-jquery-autocomplete: 9.9102 MiB
action_controller/base: 8.4922 MiB
action_controller/metal: 1.8281 MiB
abstract_controller/base: 1.0898 MiB
erubis: 0.8477 MiB (Also required by: action_view/template/handlers/erb, heroics)
erubis/engine: 0.4063 MiB (Also required by: erubis/engine/eruby)
action_dispatch/middleware/stack: 0.6367 MiB
active_support/dependencies: 0.5703 MiB (Also required by: abstract_controller/helpers, active_record/base)
abstract_controller/rendering: 1.5625 MiB
action_view/view_paths: 1.4531 MiB (Also required by: action_view/rendering)
action_view/base: 1.3477 MiB
action_view/lookup_context: 0.5156 MiB
action_view/template: 0.3789 MiB (Also required by: action_view/template/resolver)
action_controller/metal/redirecting: 1.0586 MiB
action_controller/metal/rack_delegation: 0.9297 MiB
action_dispatch/http/request: 0.8555 MiB
action_controller/metal/request_forgery_protection: 0.5859 MiB
action_controller/metal/params_wrapper: 0.5 MiB
action_dispatch/http/mime_type: 0.375 MiB (Also required by: abstract_controller/collector, jbuilder/jbuilder_template)
action_controller/metal/url_for: 0.3008 MiB
rails3-jquery-autocomplete/formtastic: 1.2578 MiB
formtastic/inputs/base: 0.8125 MiB
fog: 8.6523 MiB
fog/vcloud_director: 1.0156 MiB
fog/vcloud_director/compute: 0.9961 MiB
fog/vcloud_director/query: 0.4453 MiB
pp: 0.418 MiB (Also required by: scout_apm)
fog/openstack: 0.8398 MiB
fog/cloudstack: 0.5859 MiB
fog/cloudstack/compute: 0.5859 MiB
fog/internet_archive: 0.543 MiB
fog/internet_archive/storage: 0.5352 MiB
fog/internet_archive/core: 0.3125 MiB
fog/rackspace: 0.3867 MiB
fog/cloudsigma: 0.3594 MiB
fog/cloudsigma/compute: 0.3047 MiB
fog/vcloud: 0.3203 MiB
fog/vcloud/compute: 0.3125 MiB
fog/aws: 0.3125 MiB
twitter: 8.3711 MiB
addressable/uri: 4.2422 MiB (Also required by: twitter/base, twitter/rest/request, and 8 others)
addressable/idna: 2.7891 MiB
addressable/idna/pure: 2.7461 MiB
public_suffix: 0.3242 MiB
twitter/streaming/client: 1.7266 MiB
twitter/streaming/response: 1.4453 MiB
http: 1.418 MiB
http/response: 1.2109 MiB
http/cookie_jar: 0.9219 MiB
http/cookie: 0.9102 MiB
domain_name: 0.8203 MiB
domain_name/etld_data: 0.7813 MiB
twitter/configuration: 0.8477 MiB (Also required by: twitter/rest/help)
twitter/base: 0.6016 MiB (Also required by: twitter/entity, twitter/identity, and 12 others)
twitter/null_object: 0.4688 MiB (Also required by: twitter/trend_results)
naught: 0.4063 MiB
twitter/cursor: 0.8164 MiB (Also required by: twitter/rest/utils, twitter/rest/friends_and_followers, and 2 others)
twitter/rest/request: 0.7852 MiB (Also required by: twitter/rest/utils, twitter/rest/friends_and_followers, and 8 others)
faraday: 0.6406 MiB (Also required by: twitter/rest/client, twitter/rest/response/parse_json, and 6 others)
twitter/rest/client: 0.418 MiB
twitter/rest/api: 0.3828 MiB
asset_sync: 4.9609 MiB
asset_sync/multi_mime: 4.5039 MiB
mime/types: 4.4883 MiB (Also required by: mime/types/columnar)
mime/types/registry: 4.1914 MiB
asset_sync/storage: 0.4375 MiB
fog/core: 0.4063 MiB (Also required by: fog, fog/xml, and 48 others)
platform-api: 4.5273 MiB
platform-api/client: 2.8359 MiB
newrelic_rpm: 3.875 MiB
new_relic/control: 3.875 MiB
new_relic/agent: 3.4883 MiB
new_relic/agent/agent: 1.7422 MiB
new_relic/agent/configuration/manager: 0.4961 MiB (Also required by: new_relic/agent/configuration)
new_relic/agent/configuration/default_source: 0.3633 MiB
new_relic/agent/transaction_sampler: 0.3516 MiB
carrierwave: 2.8281 MiB (Also required by: carrierwave-aws)
carrierwave/uploader: 1.7656 MiB
friendly_id: 2.5273 MiB
friendly_id/object_utils: 2.4453 MiB
active_record/base: 2.4258 MiB
active_record/querying: 0.3906 MiB
compass: 2.1328 MiB (Also required by: compass-rails)
compass/sass_extensions: 1.2461 MiB
compass/sass_extensions/sprites: 0.6875 MiB
compass/sass_extensions/sprites/engines: 0.4609 MiB
compass/sass_extensions/sprites/engines/chunky_png_engine: 0.4492 MiB
chunky_png: 0.4492 MiB
compass/sass_extensions/functions: 0.5078 MiB
compass/configuration: 0.6172 MiB
compass/configuration/data: 0.6133 MiB
pg: 2.1055 MiB
pg_ext: 1.9102 MiB
feedjira: 2.0781 MiB
loofah: 0.625 MiB
sax-machine: 0.4414 MiB
sass-rails: 1.8047 MiB
sass/rails: 1.8008 MiB
sass/rails/helpers: 1.7578 MiB
sprockets/sass_functions: 1.7383 MiB
sass: 1.7383 MiB (Also required by: sass/rails/importer, sprockets/sass_importer)
sass/engine: 1.4492 MiB
sass/script: 0.5586 MiB (Also required by: sass/script/css_parser)
sass/scss: 0.3281 MiB
sass/scss/parser: 0.3047 MiB
scout_apm: 1.418 MiB
webrick: 0.5664 MiB
jbuilder: 1.1016 MiB (Also required by: jbuilder/jbuilder_template)
active_support/cache: 0.3906 MiB
rmagick: 1.0234 MiB
rmagick_internal.rb: 1.0195 MiB
RMagick2.so: 0.6875 MiB
lazyload-rails: 0.8555 MiB
nokogiri: 0.8555 MiB (Also required by: TOP, sax-machine/handlers/sax_nokogiri_handler, and 5 others)
sitemap_generator: 0.5195 MiB
dalli: 0.4648 MiB
unicorn: 0.457 MiB
hirb: 0.3984 MiB
I imagine 92 Mb is quite a bit in terms of gems but I do use them all in the app. Carrierwave is the largest, but very important in how I cache images on AWS (as well as with Fog) and so on. This only accounts for about 1/4 of the memory used at boot though.
In my application controller I have a before filter where I load some variables that are used throughout the website (in global headers, sidebars etc) like this:
@search = TextSearch.new
@administrator_logged_in = current_administrator
@nbr_of_stores_total = Store.active.size # Used in header
@nbr_of_blog_posts_total = BlogPost.once_posted.size # Used in header
contests_open = Contest.active.open.size
@active_contests_string = contests_open > 0 ? " (" << contests_open.to_s << ")" : ""
add_breadcrumb "Home", root_path
@open_graph_image = "https://s3.eu-central-1.amazonaws.com/myapp/assets/myapp_logo_large.png"
# Season-related
@is_christmas = false
@gift_word_seasonal = "christmas presents"
I would imagine this would be loaded into boot (and overall) memory, right?
Where else, and how, should I look for startup memory-usage? In short:
Where in my rails app should I trouble boot memory (like middleware, initializers etc)?
What tools (such as the derailed command above) can I use to find/pinpoint memory hungry calls/actions?
I am having trouble finding the direct cause and effect on my trouble shooting actions. Like, finding the answer to "if I remove this code, how much memory do I save?". How should I measure/benchmark any actions I do on my app (rather than upload and check the overall usage in the graph)?
解决方案
Try running GC.stat command This would give info on memory usage and garbage collection in the app based on which you can decide.
Do memory profiling https://github.com/ice799/memprof could also be of help to you
这篇关于如何解决引导轨道应用程序的内存膨胀问题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
