| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: GIN pending list clean up exposure to SQL |
| Date: | 2015-11-19 16:18:46 |
| Message-ID: | 20151119161846.GK614468@alvherre.pgsql |
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| Lists: | pgsql-hackers |
Alvaro Herrera wrote:
> Jeff Janes wrote:
> > I've written a function which allows users to clean up the pending list.
> > It takes the index name and returns the number of pending list pages
> > deleted.
>
> I just noticed that your patch uses AccessShareLock on the index. Is
> that okay? I would have assumed that you'd need ShareUpdateExclusive
> (same as vacuum uses), but I don't really know. Was that a carefully
> thought-out choice?
After reading gitPendingCleanup it becomes clear that there's no need
for a stronger lock than what you've chosen. Jaime Casanova just
pointed this out to me.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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