| From: | CNG L <congnanluo(at)gmail(dot)com> |
|---|---|
| To: | "pgsql-bugs(at)lists(dot)postgresql(dot)org" <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Is this a bug in auto vacuum worker? |
| Date: | 2019-01-08 18:47:01 |
| Message-ID: | CAJ3ejTw2_U7CfC6-eHuWgJaBGy=Fc5RCnVFnmiZbW3GBZnt38g@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-bugs |
In AutoVacWorkerMain(), the code calls on_shmem_exit(FreeWorkInfo,0) and
then kill() to send SIGUSR2 to autovacuum launcher process. In
FreeWorkInfo() it sets AutoVacuumShmem->av_signal[AutoVacRebalance] = true.
But, is it possible that when autovacuum launcher’s SIGUSR2 handler checks
av_signal[AutoVacRebalance], FreeWorkInfo() haven’t set this flag yet and
thus autovacuum launcher will miss the AutoVacRebalance event?
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