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Re: strange slow query - lost lot of time somewhere - Mailing list pgsql-hackers

From Pavel Stehule
Subject Re: strange slow query - lost lot of time somewhere
Date
Msg-id CAFj8pRA5Xqs4Tnfc8VTsp0A_1MfHeOPYCkcP_xdmnOPqd3E_PQ@mail.gmail.com
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In response to RE: strange slow query - lost lot of time somewhere  (Jakub Wartak <Jakub.Wartak@tomtom.com>)
Responses Re: strange slow query - lost lot of time somewhere
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čt 5. 5. 2022 v 8:51 odesílatel Jakub Wartak <Jakub.Wartak@tomtom.com> napsal:
Hi Pavel,

> I have not debug symbols, so I have not more details now
> Breakpoint 1 at 0x7f557f0c16c0
> (gdb) c
> Continuing.

> Breakpoint 1, 0x00007f557f0c16c0 in mmap64 () from /lib64/libc.so.6
> (gdb) bt
> #0  0x00007f557f0c16c0 in mmap64 () from /lib64/libc.so.6
> #1  0x00007f557f04dd91 in sysmalloc () from /lib64/libc.so.6
> #2  0x00007f557f04eaa9 in _int_malloc () from /lib64/libc.so.6
> #3  0x00007f557f04fb1e in malloc () from /lib64/libc.so.6
> #4  0x0000000000932134 in AllocSetAlloc ()
> #5  0x00000000009376cf in MemoryContextAllocExtended ()
> #6  0x00000000006ad915 in ExecInitMemoize ()

Well the PGDG repo have the debuginfos (e.g. postgresql14-debuginfo) rpms / dpkgs(?) so I hope you are basically 1 command away of being able to debug it further what happens in ExecInitMemoize()
Those packages seem to be safe as they modify only /usr/lib/debug so should not have any impact on production workload.

I just have to wait for admin action - I have no root rights for the server.

 

-J.


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