Hi Johannes, On 2016-04-04 13:13:35 -0400, Johannes Weiner wrote: > this is a follow-up to http://www.spinics.net/lists/linux-mm/msg101739.html > where Andres reported his database workingset being pushed out by the > minimum size enforcement of the inactive file list - currently 50% of cache > - as well as repeatedly written file pages that are never actually read. Thanks for following up! > Andres, I tried reproducing your postgres scenario, but I could never get > the WAL to interfere even with wal_log = hot_standby mode. It's a 8G > machine, I set shared_buffers = 2GB, ran pgbench -i -s 290, and then -c 32 > -j 32 -M prepared -t 150000. Any input on how to trigger the thrashing you > observed would be appreciated. But it would be great if you could test these > patches on your known-problematic setup as well. I'm unfortunately in the process of moving to the US (as in, I'm packing boxes), so I can't get back to you just now. I'll try ASAP (early next week). Regards, Andres -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>