Wiki seems slower than before, page cache doesn’t purge on save

[renoirb]

After some tests I realized that the site is slower than old production. There might be server details that didn’t follow up.

Tasks

From every app VM, check if:

• [x] Apache doesn’t send compressed so that Fastly can handle
• [x] Ensure that MediaWiki sends HTTP PURGE to Fastly on save, and that it works

  Log says

  SquidPurgeClient Unexpected status code: 301

Was

2015-03-20 22:05:22 app1 wpwiki: SquidPurgeClient (docs.webplatform.org): unexpected status code: 301 Moved Permanently

And there should not be.

Reference

• https://www.mediawiki.org/wiki/Manual:$wgUseESI
• https://www.mediawiki.org/wiki/Manual:$wgUseSquid
• https://www.mediawiki.org/wiki/Manual:$wgUseGzip
• https://www.mediawiki.org/wiki/Manual:$wgRCMaxAge
• https://www.mediawiki.org/wiki/Manual:$wgCacheEpoch
• https://github.com/wikimedia/operations-mediawiki-config/blob/master/wmf-config/
• https://wikitech.wikimedia.org/wiki/MediaWiki_caching

[renoirb]

Moved notes to wiki https://docs.webplatform.org/wiki/WPD:Infrastructure/architecture/Things_to_consider_when_we_expose_service_via_Fastly_and_Varnish

[renoirb]

Feature works. More improvements to come later once documentation and notes are gathered.