Last modified: 2013-03-13 12:25:33 UTC
Deletion of file takes ~8 seconds. I got numerous reports about that from ru.wikipedia and was able to reproduce that on test.wikipedia as well. Please investigate. Profiler output (all entries >1%): <!-- 100.00% 7.811909 1 - -total 98.61% 7.702979 1 - MediaWiki::main 96.82% 7.563558 1 - MediaWiki::performRequest 96.66% 7.550731 1 - MediaWiki::performAction 34.97% 2.731953 2 - FileBackendStore::doOperationsInternal 29.91% 2.336342 1 - FileBackendStore::deleteInternal 15.57% 1.216589 1 - FileBackendStore::doClean 13.43% 1.049439 1 - LocalFileDeleteBatch::execute 5.64% 0.440752 1 - AbuseFilterHooks::onArticleDelete 5.63% 0.439517 1 - AbuseFilter::filterAction 5.62% 0.438832 1 - AbuseFilter::checkAllFilters 5.36% 0.418516 3 - LockManager::unlock 3.81% 0.297513 3 - LockManager::lock 3.35% 0.261549 258 - MWMemcached::get 2.23% 0.174238 52 - AbuseFilter::checkConditions 2.22% 0.173525 51 - DatabaseBase::query-master 1.97% 0.153577 11 - Title::getUserPermissionsErrorsInternal 1.95% 0.152442 2 - FileBackendStore::doPrepare 1.75% 0.136925 1 - MediaWiki::finalCleanup 1.70% 0.132838 1 - FileBackendStore::moveInternal 1.68% 0.131577 1 - OutputPage::output 1.52% 0.119060 1 - Output-skin 1.52% 0.118848 1 - SkinTemplate::outputPage 1.51% 0.118343 2 - CentralAuthHooks::onUserGetRights 1.38% 0.108028 46 - AbuseFilterParser::doLevelFunction 1.36% 0.106230 1 - wmfPurgeBackendThumbCache 1.09% 0.085180 5 - User::getEffectiveGroups 1.03% 0.080707 9 - User::load 1.02% 0.079321 1 - FileBackendStore::doSecure
Just a note: the above profiling output is for [[testwiki:File:Teeeest.png]]. I also tested it with File:Gpl-dos.png, and it was even more than 8 secs.
I thought this was a dupe, but I can't see it. There is bug 34717 which is slow file reversion. If they weren't related I'd be rather suprised CC'ing Aaron and Ben
For Swift's view of query latency, see http://ganglia.wikimedia.org/latest/graph_all_periods.php?hreg[]=^ms-fe[1-9]&mreg[]=swift_GET_200_avg&mreg[]=swift_PUT_201_avg&mreg[]=swift_DELETE_204_avg>ype=line&title=Swift+average+query+response+time+-+200s&z=large&aggregate=1&r=hour. PUTs and DELETEs take about 200-300ms.
Victor: Is this still a problem nowadays, or could this be closed as RESOLVED WORKSFORME?
I am not exactly sure. I do not remember, it was probably either temporary server issue (which means you can close it), or an issue which works only with a certain class of files (which probably means debugging).
No indication that problem still exists - please feel free to reopen if there are issues again.
