Joe added a comment.
I think I know what happened here - and it's possibly in relation with T223180 <https://phabricator.wikimedia.org/T223180> . PHP7's APC memory was perfectly ok when I looked into it (and we just had the beta feature enabled), but it's not sufficient by far when real traffic hits php-fpm. So evictions were happening from APC and this might cause what we're seeing there. I'm modifying the APC shm size across all php servers to see, amongst other things, if this fixes this effect. TASK DETAIL https://phabricator.wikimedia.org/T223310 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: elukey, Joe Cc: Tarrow, alaa_wmde, Catrope, kostajh, Joe, Krinkle, aaron, jijiki, Aklapper, akosiaris, elukey, Addshore, E.S.A-Sheild, darthmon_wmde, joker88john, Legado_Shulgin, CucyNoiD, Nandana, NebulousIris, thifranc, AndyTan, Gaboe420, Versusxo, Majesticalreaper22, Giuliamocci, Davinaclare77, Adrian1985, Qtn1293, Cpaulf30, Imarlier, Lahi, Gq86, Baloch007, Darkminds3113, Bsandipan, Lordiis, GoranSMilovanovic, Adik2382, Th3d3v1ls, Hfbn0, Ramalepe, Liugev6, QZanden, LawExplorer, Vali.matei, WSH1906, Lewizho99, Zppix, Maathavan, _jensen, rosalieper, Taiwania_Justo, Jonas, Wong128hk, Wikidata-bugs, aude, Lydia_Pintscher, faidon, Mbch331, Jay8g, fgiunchedi, Dzahn
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