openstack/openstack-ansible-galera_server
Code Issues Proposed changes

Decrease MariaDB wait timeout

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This MariaDB setting uses the same timeout for SQL connections
as configured inside SQL Alchemy (pool_recycle) and prevent possibly
SQL session build up due to a large default setting (8 Hours).

Nova and Neutron are using a idle_timeout of 3600 by default,
for example
https://github.com/openstack/nova/blob/master/nova/db/sqlalchemy/api.py#L101
and respectively for Neutron
https://github.com/openstack/neutron/blob/stable/liberty/etc/neutron.conf#L761

Change-Id: I273739c3c10616cac148aeb839154e0fb3359bca
Closes-Bug: #1571682
This commit is contained in:
Bjoern Teipel 2016-04-18 09:32:27 -05:00
parent c8b8902402
commit a1636b3bb3
2 changed files with 6 additions and 1 deletions
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2
defaults/main.yml
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@ -45,7 +45,7 @@ galera_max_heap_table_size: 32M
galera_tmp_table_size: 32M
galera_file_limits: 65535
galera_wait_timeout: 28800
galera_wait_timeout: 3600
## innodb options
galera_innodb_buffer_pool_size: 4096M

5
releasenotes/notes/decrease-mariadb-waittimeout-setting-ddaae0f2e1d31ee1.yaml Normal file
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@ -0,0 +1,5 @@
---
upgrade:
- The MariaDB wait_timeout setting is decreased to 1h to match the
SQL Alchemy pool recycle timeout, in order to prevent unnecessary
database session buildups.