[00:04:36] After upgrading to REL1_44 branch, I found that my wikis are down with PHP errors like "Fatal error: Allowed memory size of 536870912 bytes exhausted". I ran some maintenance scripts and they succeeded without these OOM errors. [00:05:09] What may lead to OOM errors that appear only when using php-fpm. [00:05:24] * "only when php-fpm ?" [07:33:38] So, for starters, php cli tends to have a memory limit of 0 by default, which means it can happily eat as much memory as the server provides. Although, generally maintenance scripts are not doing a huge amount of operations that the web request is, which includes loading things like skins, interfaces, checking who users are and what they can do, [07:33:39] etc. Somewhat concerns me that you've got a request OOMing at half a gig though.