Comment 8 for bug 955776

Hi Anton,

We have at least one confirmed problem which makes a class of queries cause OOM and burn quite a few CPU cycles on the way: https://bugs.launchpad.net/maria/+bug/954262 . As you have several hundred mysqld processes running at once, chances are that at any moment one of them attempts to execute the "evil" query. If you think this is something you might be experiencing, I suggest to wait till the fix is released, the bug is being actively worked upon now.

Meanwhile, I will re-address your request to Axel who runs performance benchmarks, in case he has any ideas or has seen similar patterns in his tests.