| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: GetCurrentVirtualXIDs() |
| Date: | 2009-04-04 17:44:13 |
| Message-ID: | 22820.1238867053@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> No need to wait for idle-in-transaction sessions during index builds.
> GetCurrentVirtualXIDs() specifically *includes* backends that have
> proc->xmin == InvalidTransactionId (0), but I'm not sure why.
Applied with the discussed tweaks. I also added some logic to make
DefineIndex recheck the GetCurrentVirtualXIDs output each time it is
about to wait for another session. If we observe some other session
to have xmin = 0 at any one of those instants, we don't have to
wait for it. Not sure how much that will really help in practice,
but it can't hurt.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Robert Haas | 2009-04-04 21:13:13 | monitoring-stats.html documentation |
| Previous Message | Greg Stark | 2009-04-04 15:42:59 | Re: Saner interval hash function |