use jemalloc memory allocator

docker-library/ruby#182 https://www.speedshop.co/2017/12/04/malloc-doubles-ruby-memory.html
camallen · Mar 20, 2019 · f849bca · f849bca
1 parent d8cabee
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diff --git a/Dockerfile b/Dockerfile
@@ -9,9 +9,12 @@ RUN apt-get update && \
         supervisor \
         libpq-dev \
         tmpreaper \
+        libjemalloc1 \
         && \
     apt-get clean && rm -rf /var/lib/apt/lists/*
 
+ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
+
 RUN mkdir config && curl "https://ip-ranges.amazonaws.com/ip-ranges.json" > config/aws_ips.json
 
 ADD ./Gemfile /rails_app/

diff --git a/Dockerfile.dev b/Dockerfile.dev
@@ -16,9 +16,12 @@ RUN apt-get update && apt-get -y upgrade && \
     libpq-dev \
     postgresql-client-9.4 \
     tmpreaper \
+    libjemalloc1 \
     && \
     apt-get clean
 
+ENV LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1
+
 ADD ./Gemfile /rails_app/
 ADD ./Gemfile.lock /rails_app/