openstack/tripleo-heat-templates
Code Issues Proposed changes

Increase default netdev_max_backlog to 10x

Browse Source 
It has been observed that on large clouds the netdev backlog
buffer might overflow. This change increases the default by ten
times.

The /proc/net/softnet_stat file contains a counter in the 2nd
column that is incremented when the netdev backlog queue overflows.
If this value is incrementing over time, then netdev_max_backlog
needs to be increased [1].

[1]. https://bugzilla.redhat.com/show_bug.cgi?id=1283676

Change-Id: Iec12324fd3a24e8b608b1e1849c270cc24cb0e60
This commit is contained in:
Giulio Fidente 2016-02-08 23:54:54 +01:00
parent bb05fa304a
commit 42fef7257d
1 changed files with 2 additions and 0 deletions

2
puppet/hieradata/common.yaml

@ -31,6 +31,8 @@ sysctl_settings:
value: 0
net.ipv6.conf.default.autoconf:
value: 0
net.core.netdev_max_backlog:
value: 10000
nova::rabbit_heartbeat_timeout_threshold: 60
neutron::rabbit_heartbeat_timeout_threshold: 60