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[ubuntu-24] Set read_ahead_kb kernel parameter to 128 (#13938)

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Georgy Puzakov
2026-04-19 14:54:05 +02:00
committed by GitHub
parent a8a3c82585
commit 1d950d2fc7
2 changed files with 32 additions and 0 deletions
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images/ubuntu/scripts/build/configure-environment.sh
+10
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@@ -52,6 +52,16 @@ mkdir -p $rules_directory
touch $netfilter_rule
echo 'ACTION=="add", SUBSYSTEM=="module", KERNEL=="nf_conntrack", RUN+="/usr/sbin/sysctl net.netfilter.nf_conntrack_tcp_be_liberal=1"' | tee -a $netfilter_rule
# https://github.com/actions/runner-images/issues/13770
# https://github.com/ravendb/ravendb/discussions/22410
# Linux kernel 6.17 changed read_ahead_kb default from 128 to 4096 on Azure VMs
# where disks are presented as rotational (ROTA=1). This floods the page cache
# with unused data during random-access I/O and causes memory exhaustion and thrashing.
if is_ubuntu24; then
readahead_rule='/etc/udev/rules.d/99-readahead.rules'
echo 'ACTION=="add|change", KERNEL=="sd*", ATTR{queue/read_ahead_kb}="128"' | tee "$readahead_rule"
fi
# Create symlink for tests running
chmod +x $HELPER_SCRIPTS/invoke-tests.sh
ln -s $HELPER_SCRIPTS/invoke-tests.sh /usr/local/bin/invoke_tests