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sysctl: Adopt more settings from the IBM HPC guidelines

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https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/Welcome%20to%20High%20Performance%20Computing%20%28HPC%29%20Central/page/Linux%20System%20Tuning%20Recommendations

Since we have already configured most of our IP/TCP stack
for low latency and fast throughput, these settings complete
those efforts.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
This commit is contained in:
Michael Tremer
2019-10-14 16:44:54 +00:00
committed by Arne Fitzenreiter
parent d3ef457692
commit 58b3c9b58a
1 changed files with 7 additions and 0 deletions
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7
config/etc/sysctl.conf
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@@ -76,9 +76,16 @@ vm.swappiness = 1
kernel.sched_migration_cost_ns = 5000000
# Increase kernel buffer size maximums
net.ipv4.tcp_mem = 16777216 16777216 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 16384 16777216
net.ipv4.udp_mem = 3145728 4194304 16777216
# Prefer low latency over higher throughput
net.ipv4.tcp_low_latency=1
# Reserve more socket space for the TCP window
net.ipv4.tcp_adv_win_scale=2
# Enable TCP fast-open
net.ipv4.tcp_fastopen = 3