Reviewed: https://review.opendev.org/735618 Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=e09d4d6dd0f6570400d28531e56d2166141357cb Submitter: Zuul Branch: master
commit e09d4d6dd0f6570400d28531e56d2166141357cb Author: Daniel Alvarez <[email protected]> Date: Mon Jun 15 17:17:53 2020 +0200 [OVN] Avoid unnecessary DB writes during agent liveness check As stated in the bug description, there are many writes of the agent liveness external_ids into the Chassis table. There was a protection to avoid bumping nb_cfg too frequently. The same protection is reused to avoid writing into the Chassis external_ids. This patch reduces the number of transactions to the SB database and, therefore, the recomputations that it causes to ovn-controller in all nodes. Change-Id: I5db90fde8e7394772ec23c6384c711096c246621 Closes-Bug: #1883554 Signed-off-by: Daniel Alvarez <[email protected]> ** Changed in: neutron Status: In Progress => Fix Released -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1883554 Title: [ovn] Agent liveness checks create too many writes into OVN db Status in neutron: Fix Released Bug description: Every time the agent liveness check is triggered (via API or periodically every agent_down_time / 2 seconds), there are a lot of writes into the SB database on the Chassis table. These writes triggers recomputation on ovn-controller running in all nodes having a considerable performance hit, especially under stress. After this commit was merged [0] we avoided bumping nb_cfg too frequently but still we're performing writes into the Chassis table to often, from all the workers. We should use the same logic in [1] to avoid writes that have happened recently. [0] https://opendev.org/openstack/neutron/commit/647b7f63f9dafedfa9fb6e09e3d92d66fb512f0b [1] https://github.com/openstack/neutron/blob/4de18104ae88a835544cefbf30c878aa49efc31f/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py#L1075 To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/1883554/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
