On 24/03/12 21:36, Max Semenik wrote:
And these graphs don't make any sense:
https://graphite.wikimedia.org/dashboard/MobileFrontend-DOMParse
the whole function's execution time is much larger than sum of its
pieces. What's going on?
Maybe it's a recursive function?
I would have suspected that the parser fixes affected some common
extension making it slower.
Ganglia output shows that CPU load decreased, though. From a steady load
over 10k it became much more flaky, dropping to 9k (due to full
operations being slower?).
Is the revision hashing still running? If there are processes fetching
many old revisions from esternal storage it might be the hurting the
caches (such as taking "fresh" parsed pages out of memcached).
Another idea would be related to db24 failure, if some hosts failed the
syncing of db.php and still pointed to it.