Horton

Re: BF mamba failure

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Amit Kapila <amit.kapila16@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>, Peter Smith <smithpb2250@gmail.com>
Date: 2023-03-18T04:26:03Z
Lists: pgsql-hackers 
Amit Kapila <amit.kapila16@gmail.com> writes:
> Peter Smith has recently reported a BF failure [1]. AFAICS, the call
> stack of failure [2] is as follows:

Note the assertion report a few lines further up:

TRAP: failed Assert("pg_atomic_read_u32(&entry_ref->shared_entry->refcount) == 0"), File: "pgstat_shmem.c", Line: 560, PID: 25004

			regards, tom lane

Commits

  1. Add information about "generation" when dropping twice pgstats entry

  2. Fix race conditions with drop of reused pgstats entries