| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "D'Arcy J(dot)M(dot) Cain" <darcy(at)druid(dot)net> |
| Cc: | "Keith Bottner" <kbottner(at)comcast(dot)net>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: What's faster? |
| Date: | 2003-12-27 18:30:38 |
| Message-ID: | 12771.1072549838@sss.pgh.pa.us |
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| Lists: | pgsql-performance |
"D'Arcy J.M. Cain" <darcy(at)druid(dot)net> writes:
> We went through this recently. One thing we found that may apply to you is
> how many fields in the client record have a foreign key constraint. We find
> that tables with lots of FKeys are a lot more intensive on updates.
BTW, this should have gotten better in 7.3.4 and later --- there is
logic to skip checking an FKey reference if the referencing columns
didn't change during the update.
regards, tom lane
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