| Gehel created this task. Gehel added projects: Wikidata-Query-Service, Discovery-Wikidata-Query-Service-Sprint. Herald added a subscriber: Aklapper. Herald added projects: Wikidata, Discovery. |
TASK DESCRIPTION
A quick look at GC logs on wdqs1004 show that almost 5% of time is spent in GC. That seems pretty high. During the last week, 2 full GC took more than 20 seconds (not good, but if it is only 2 times per week, we can probably live with it). Over the same time frame, heap after GC almost always go back to less than 8GB, with a minimum of around 2GB, this indicates that we probably have oversized the heap by a factor between 2 and 8.
The first step is probably to reduce the heap to 10GB and go further down from there.
Also note that we are using G1 on wdqs, which I personally understand much less than the more traditional GCs...
TASK DETAIL
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To: Gehel
Cc: Smalyshev, Gehel, Aklapper, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, Avner, debt, Jonas, FloNight, Xmlizer, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
Cc: Smalyshev, Gehel, Aklapper, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, Avner, debt, Jonas, FloNight, Xmlizer, Izno, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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