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Preload libjemalloc.so for long-running Ruby (#16462)

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Always mark jemalloc needed if jemalloc is enabled by akihikodaki · Pull Request #4627 · ruby/ruby
https://github.com/ruby/ruby/pull/4627
> Symbols exported by jemalloc is referred by the shared library but not
> by the executables when building Ruby as a shared library with
> jemalloc. It causes shared libraries such as the GNU C++ library
> occasionally rely on the memory allocator provided by the standard C
> library. Worse, the resolved symbols can later be replaced with
> jemalloc, and jemalloc may see pointers from the standard C library,
> which results in various failures.
> e.g. https://github.com/tootsuite/mastodon/issues/15751

As a workaround, do not rely on jemalloc enablement of Ruby, and
preload libjemalloc.so instead.
This commit is contained in:
Akihiko Odaki 2021-07-06 02:16:35 +09:00 committed by GitHub
parent 67226acf7e
commit 8af7f3b063
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1
dist/mastodon-sidekiq.service vendored
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@ -9,6 +9,7 @@ WorkingDirectory=/home/mastodon/live
Environment="RAILS_ENV=production" Environment="RAILS_ENV=production"
Environment="DB_POOL=25" Environment="DB_POOL=25"
Environment="MALLOC_ARENA_MAX=2" Environment="MALLOC_ARENA_MAX=2"
Environment="LD_PRELOAD=libjemalloc.so"
ExecStart=/home/mastodon/.rbenv/shims/bundle exec sidekiq -c 25 ExecStart=/home/mastodon/.rbenv/shims/bundle exec sidekiq -c 25
TimeoutSec=15 TimeoutSec=15
Restart=always Restart=always

1
dist/mastodon-web.service vendored
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@ -8,6 +8,7 @@ User=mastodon
WorkingDirectory=/home/mastodon/live WorkingDirectory=/home/mastodon/live
Environment="RAILS_ENV=production" Environment="RAILS_ENV=production"
Environment="PORT=3000" Environment="PORT=3000"
Environment="LD_PRELOAD=libjemalloc.so"
ExecStart=/home/mastodon/.rbenv/shims/bundle exec puma -C config/puma.rb ExecStart=/home/mastodon/.rbenv/shims/bundle exec puma -C config/puma.rb
ExecReload=/bin/kill -SIGUSR1 $MAINPID ExecReload=/bin/kill -SIGUSR1 $MAINPID
TimeoutSec=15 TimeoutSec=15