| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | s(dot)borse(at)direction(dot)biz, "Julius Tuskenis" <julius(at)nsoft(dot)lt>, pgsql-admin(at)postgresql(dot)org |
| Subject: | Re: query optimization |
| Date: | 2008-07-10 16:21:44 |
| Message-ID: | 9895.1215706904@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-admin |
On Thu, Jul 10, 2008 at 3:45 AM, Suresh Borse <s(dot)borse(at)direction(dot)biz> wrote:
>> The view executes very faster for the first time.
>> When I execute the view again and again suddenly it gets slow or it gets
>> hang.
>> The view contains multi-table joins.
Uh, how many joins?
If you're exceeding geqo_threshold then you would get plans with a
random component to them. You might want to increase the threshold,
although planning time would probably go up.
Also, what PG version is this?
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Mikel Lindsaar | 2008-07-11 02:02:01 | Importing data - possible UTF8 import bug? |
| Previous Message | Scott Marlowe | 2008-07-10 15:47:29 | Re: query optimization |