https://bugzilla.wikimedia.org/show_bug.cgi?id=68062
Bug ID: 68062
Summary: Improve how Mediawiki handles a DB host that is flaky
rather than completely down
Product: MediaWiki
Version: unspecified
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: Unprioritized
Component: Database
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Web browser: ---
Mobile Platform: ---
From
https://wikitech.wikimedia.org/wiki/Incident_documentation/20140619-parsercache
3. Mediawiki PHP may need some better way of handling a DB host that is flaky
rather than completely down. Historically we've seen similar lock-up behavior
on S[1-7] where one slave having problems leads to unnecessary outages. As it
happens this week we discussed options for DB proxies (haproxy probably) in
#mediawiki_security, both for HA and maintenance reasons. It's possible that
PHP simply should not be connecting directly to databases without hand-holding.
This need to take Mediawiki LB and query groups into account. May even need
heartbeat and STONITH?
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