| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Reducing ClogControlLock contention |
| Date: | 2015-08-11 13:57:14 |
| Message-ID: | CANP8+jJ=zgXn6YSXh4TXo-A0V-7p4dLRMiPnAUS8_CrEipvP8g@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 11 August 2015 at 14:53, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> One more point here why do we need CommitLock before calling
> SimpleLruReadPage_ReadOnly() in the patch and if it is not required,
> then can we use LWLockAcquire(shared->buffer_locks[slotno], LW_EXCLUSIVE);
> instead of CommitLock?
>
That prevents read only access, not just commits, so that isn't a better
suggestion.
--
Simon Riggs http://www.2ndQuadrant.com/
<http://www.2ndquadrant.com/>
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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