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puppet: Adjust thresholds on autovac_freeze.

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These thresholds are in relationship to the
`autovacuum_freeze_max_age`, *not* the XID wraparound, which happens
at 2^31-1.  As such, it is *perfectly normal* that they hit 100%, and
then autovacuum kicks in and brings it back down.  The unusual
condition is that PostgreSQL pushes past the point where an autovacuum
would be triggered -- therein lies the XID wraparound danger.

With the `autovacuum_freeze_max_age` set to 2000000000 in
`postgresql.conf`, XID wraparound happens at 107.3%.  Set the warning
and error thresholds to below this, but above 100% so this does not
trigger constantly.
This commit is contained in:
Alex Vandiver
2021-05-11 13:18:55 -10:00
committed by Tim Abbott
parent 6a374d6d28
commit feb7870db7
1 changed files with 1 additions and 1 deletions
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2
puppet/zulip_ops/files/nagios3/conf.d/services.cfg
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@@ -157,7 +157,7 @@ define service {
define service {
use generic-service
service_description Check PostgreSQL autovac_freeze
check_command check_postgres!zulip!nagios!autovac_freeze
check_command check_postgres_alert_args!zulip!nagios!autovac_freeze!101%!105%
hostgroup postgresql_primary
contact_groups admins
}