| From: | "MauMau" <maumau307(at)gmail(dot)com> |
|---|---|
| To: | "Heikki Linnakangas" <hlinnakangas(at)vmware(dot)com> |
| Cc: | "Andres Freund" <andres(at)2ndquadrant(dot)com>, "Craig Ringer" <craig(at)2ndquadrant(dot)com>, <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [9.4 bug] The database server hangs with write-heavy workload on Windows |
| Date: | 2014-10-15 12:03:42 |
| Message-ID: | C14E24B014CB434EA821DE702EEC3253@maumau |
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| Lists: | pgsql-hackers |
From: "MauMau" <maumau307(at)gmail(dot)com>
> Thank you very much. I didn't anticipate such a difficult complicated
> cause. The user agreed to try the patch tonight. I'll report back the
> result as soon as I got it from him.
The test ran successfully without hang for 24 hours. It was run with your
patch + the following:
> BTW, in LWLockWaitForVar(), the first line of the following code fragment
> is not necessary, because lwWaitLink is set to head immediately. I think
> it would be good to eliminate as much unnecessary code as possible from
> the spinlock section.
>
> proc->lwWaitLink = NULL;
>
> /* waiters are added to the front of the queue */
> proc->lwWaitLink = lock->head;
>
Regards
MauMau
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