| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Treat <xzilla(at)users(dot)sourceforge(dot)net> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [COMMITTERS] pgsql: Fix TransactionIdIsCurrentTransactionId() to use binary search |
| Date: | 2008-03-27 21:11:37 |
| Message-ID: | 2092.1206652297@sss.pgh.pa.us |
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| Lists: | pgsql-committers pgsql-hackers pgsql-performance |
Robert Treat <xzilla(at)users(dot)sourceforge(dot)net> writes:
> On Sunday 16 March 2008 22:18, Tom Lane wrote:
>> Fix TransactionIdIsCurrentTransactionId() to use binary search instead of
>> linear search when checking child-transaction XIDs.
> Are there any plans to backpatch this into REL8_3_STABLE?
No.
> It looks like I am
> hitting a pretty serious performance regression on 8.3 with a stored
> procedure that grabs a pretty big recordset, and loops through doing
> insert....update on unique failures. The procedure get progressivly slower
> the more records involved... and dbx shows me stuck in
> TransactionIdIsCurrentTransactionId().
If you can convince me it's a regression I might reconsider, but I
rather doubt that 8.2 was better,
regards, tom lane
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