Use jemalloc on Zuul v3 executors
FreeBSD libc's malloc implementation, jemalloc, performs better than glibc's for some tasks. In the case of our Zuul executors, we've seen useful improvements in memory efficiency. Update the Puppet module to install the libjemalloc1 package on Zuul executor servers and export the necessary LD_PRELOAD envvar to use it when launching executor daemons. Change-Id: I8d8de3c118bd09d408b23a16482f71198a1232fc
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@ -33,6 +33,13 @@ class zuul::executor (
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],
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}
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# Alternative malloc implementation with better packing performance
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if ! defined(Package['libjemalloc1']) {
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package { 'libjemalloc1':
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ensure => present,
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}
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}
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include ::pip::python3
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exec { 'install-ara-safely':
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@ -503,7 +503,7 @@ class zuul (
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file { '/etc/default/zuul-executor':
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ensure => present,
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mode => '0444',
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content => "PIDFILE=/var/run/zuul/executor.pid\n",
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content => "PIDFILE=/var/run/zuul/executor.pid\nexport LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libjemalloc.so.1\n",
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}
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file { '/etc/default/zuul-scheduler':
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