FROM ruby:2.7-alpine AS builder
RUN apk add build-base
RUN wget -O - https://github.com/jemalloc/jemalloc/releases/download/5.2.1/jemalloc-5.2.1.tar.bz2 | tar -xj && \
cd jemalloc-5.2.1 && \
./configure && \
make && \
make install
FROM ruby:2.7-alpine
COPY --from=builder /usr/local/lib/libjemalloc.so.2 /usr/local/lib/
ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so.2
Last active
June 20, 2024 10:03
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Enable jemalloc for alpine.
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# Check server process is using jemalloc | |
# ref. [Japanese] https://tech.studyplus.co.jp/entry/2019/09/09/094140 | |
class AppController < ActionController::Base | |
def show | |
r = `strings /proc/#{Process.pid}/maps | grep jemalloc` | |
render plain: "<h1>#{ENV['LD_PRELOAD'].presence || 'empty'}</h1><pre>#{r}</pre>" | |
end | |
end |
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