Rails Out of Memory Fix: Phusion Passenger Tuning
Stop the Linux OOM Killer from crashing your servers. A guide to Rails out of memory fixes via Phusion Passenger tuning and worker process limits.
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Rails Performance Optimization
Deep engineering on memory allocators (jemalloc), Ruby GC tuning, N+1 elimination, connection pooling, asset pipeline bloat, and OOM prevention in Passenger/Puma workers.
PgBouncer Setup for Legacy Rails Connection Pooling
Solve ActiveRecord::ConnectionTimeoutError. Learn how to configure PgBouncer for legacy Rails connection pooling using transaction mode.
Solving Rails Asset Pipeline Memory Bloat
Prevent OOM crashes on CI/CD. Learn how to debug and fix Rails asset pipeline memory bloat during rake assets:precompile.
Ruby Garbage Collection Tuning for Older Versions
Optimize your legacy Ruby performance. Learn how to tune garbage collection using RUBY_GC_HEAP_INIT_SLOTS and other ENV variables.
Fixing Sidekiq Memory Leaks with jemalloc
Stop Sidekiq memory bloat. Learn how to fix perceived memory leaks in legacy Ruby apps by replacing glibc malloc with jemalloc.
Fixing Sidekiq Memory Leaks with jemalloc in Legacy Rails
Proof-of-concept for replacing glibc malloc with jemalloc in legacy Rails Sidekiq workers. Reduce Resident Set Size (RSS) by up to 50% without altering application code.
Fix Rails N+1 Queries Effectively Using Bullet Gem
Stop database timeouts. Learn how to identify and fix Rails N+1 queries using eager loading and the Bullet gem in legacy applications.