https://bugzilla.wikimedia.org/show_bug.cgi?id=41130
--- Comment #75 from Rob Lanphier <[email protected]> --- Hi everyone. Our apologies for the problems with caching. We're monitoring the situation, and will continue to monitor it. As of right now, things *should* be better, but there's still work that Ops needs to do to know that for sure. This bug, unfortunately, isn't a useful description of anything anymore, and I can't in good conscience assign this to a developer or an ops engineer. It has become a place that people to vent about caching issues generally, and is more heat than light. There are at least three different issues that I can see: 1. Squid/varnish cache contains images that aren't in Swift, and don't purge because only images in Swift get purged. This is the problem that Aaron described in comments 8 and comment 9 of this bug. We plan to fix this problem after we fully migrate to Varnish, but it's a complicated fix, and won't happen right away. The workaround for this problem is in comment 18. My response is unchanged from comment 34. 2. Multicast purge requests don't make it to all of the Varnish & Squid caches. This is most likely the problem that people are actually complaining about the most in the past week. This is generally an Ops issue, and in fact, Leslie Carr is working on the problem, with help from others. The issue is that some of our routing/switch equipment doesn't reliably route the purge requests to all of the places they need to be. They have periodic fixes for the problem, but we don't know yet if they have things configured such that the problem will remain fixed. 3. Cache purging issues are not monitored sufficiently. This is bug 43449, and is another issue that needs to be addressed by the Ops team. I'm going to leave this issue open for now, but at this point, but once the other issues get filed, I plan to close this issue and use the other bug reports to track this. -- You are receiving this mail because: You are watching all bug changes. _______________________________________________ Wikibugs-l mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikibugs-l
