jemalloc coring in je_bitmap_set
danielmicay at gmail.com
Tue Aug 18 18:59:01 PDT 2015
On 18/08/15 05:58 PM, Paul Marquess wrote:
>>> Do you have any feeling whether it is safe to have jemalloc and THP at the same time?
>> I've had pretty poor experience with the mixture even within the past month. The problem is that at some point (under a day of intermittent benchmarking in all the cases I observed) the kernel gets into a fragmented memory state that it cannot recover from without a reboot, and the only obvious indications are decreased performance and increased page faults.
> Do you think that disabling madvise with opt.lg_dirty_mult:-1 allows jemalloc & THP to co-exist without causing other unwanted side-effects?
Well, you won't lose huge pages if you've disabled purging. It's going
to increase memory usage but that may not be a problem for you.
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