BBlack has uploaded a new change for review. https://gerrit.wikimedia.org/r/295539
Change subject: r::c::perf: un-mysterious netdev_max_backlog ...................................................................... r::c::perf: un-mysterious netdev_max_backlog This raises from 30K to 60K and documents. Change-Id: Iddea34f9d587b68bcccbdc45a9f8bd05f823f806 --- M modules/role/manifests/cache/perf.pp 1 file changed, 7 insertions(+), 2 deletions(-) git pull ssh://gerrit.wikimedia.org:29418/operations/puppet refs/changes/39/295539/1 diff --git a/modules/role/manifests/cache/perf.pp b/modules/role/manifests/cache/perf.pp index e94fc08..feaf1fa 100644 --- a/modules/role/manifests/cache/perf.pp +++ b/modules/role/manifests/cache/perf.pp @@ -88,8 +88,13 @@ # Increase the number of ephemeral ports 'net.ipv4.ip_local_port_range' => [ 1024, 65535 ], - # Recommended to increase this for 1000 BT or higher - 'net.core.netdev_max_backlog' => 30000, # 'mysterious' + # All prod caches are 10GbE, standard recommendation is 300K for 10G + # and 30K for 1G. Our inbound traffic max is closer to 1G levels, + # since we have 10G LVS splitting traffic to ~8 or more hosts for + # high-traffic clusters. Still, we should double the 1GbE numbers + # at least, just in case of bursts and inequality, etc. If low, + # will see drops in col 2 of /proc/net/softnet_stat + 'net.core.netdev_max_backlog' => 60000, # Increase the queue size of new TCP connections 'net.core.somaxconn' => 4096, # 'mysterious' -- To view, visit https://gerrit.wikimedia.org/r/295539 To unsubscribe, visit https://gerrit.wikimedia.org/r/settings Gerrit-MessageType: newchange Gerrit-Change-Id: Iddea34f9d587b68bcccbdc45a9f8bd05f823f806 Gerrit-PatchSet: 1 Gerrit-Project: operations/puppet Gerrit-Branch: production Gerrit-Owner: BBlack <bbl...@wikimedia.org> _______________________________________________ MediaWiki-commits mailing list MediaWiki-commits@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/mediawiki-commits