Re: Antw: [EXT] Re: dynlist vs memberof performance issues
Ulrich Windl wrote:
>>> "Paul B. Henson" <henson(a)acm.org> schrieb
am 22.05.2022 um 04:51 in Nachricht
<5d343067-aef3-b499-63e3-996f3d68051e(a)acm.org>:
> On 5/11/2022 3:48 AM, Soisik Froger wrote:
>
>> Are this performance issues an expected side-effect of switching to
>> dynlist - as the memberOf attributes are now dynamically calculated
>> while the memberOf overlay used to writes these attributes - or
>
> I am also having ongoing sporadic issues with memberOf performance using
> the new dynlist overlay. Initially, randomly a server would get into a
> state where any query requesting the memberOf attribute would take in
> excess of 30 seconds, whereas normally it would only take a fraction of
> a second. The symptoms were the same, free memory, no swapping, but
> insanely high read IO load.
I'm wondering: If you'd make a core dump when the issue happens, how big would
such a core dump be with MDB?
I'm afraid it would be insanely large, containing the whole database. Am I wrong?
Yes, you are wrong.
mmap'd memory isn't included in core dumps by default.
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