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help / color / mirror / Atom feedFrom: Michael Paquier <[email protected]>
To: Rahila Syed <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Enhancing Memory Context Statistics Reporting
Date: Thu, 14 Nov 2024 13:39:14 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAH2L28vtosqeTDuyY0v-2WUGcbhcX80fpAqiVwvBzk=+yn5awg@mail.gmail.com>
References: <CAH2L28v8mc9HDt8QoSJ8TRmKau_8FM_HKS41NeO9-6ZAkuZKXw@mail.gmail.com>
<[email protected]>
<CAH2L28vtosqeTDuyY0v-2WUGcbhcX80fpAqiVwvBzk=+yn5awg@mail.gmail.com>
On Wed, Nov 13, 2024 at 01:00:52PM +0530, Rahila Syed wrote:
> I used one DSA area per process to share statistics. Currently,
> the size limit for each DSA is 16 MB, which can accommodate
> approximately 6,700 MemoryContextInfo structs. Any additional
> statistics will spill over to a file. I opted for DSAs over DSMs to
> enable memory reuse by freeing segments for subsequent
> statistics copies of the same backend, without needing to
> recreate DSMs for each request.
Already mentioned previously at [1] and echoing with some surrounding
arguments, but I'd suggest to keep it simple and just remove entirely
the part of the patch where the stats information gets spilled into
disk. With more than 6000-ish context information available with a
hard limit in place, there should be plenty enough to know what's
going on anyway.
[1]: https://postgr.es/m/[email protected]
--
Michael
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