| From: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Vadim Mikheev <vadim(at)krs(dot)ru> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] mdnblocks is an amazing time sink in huge relations |
| Date: | 1999-10-20 03:57:44 |
| Message-ID: | 199910200357.XAA04714@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-hackers |
> I agreed that there is no way to get accurate estimation for
> # of rows to be seen by a query...
> Well, let's keep up-to-date # of rows present in relation:
> in any case a query will have to read them and this is what
> we need to estimate cost of simple scans, as for costs of
> joins - now way, currently(?) -:(
>
> But please remember that there is another SCC goal -
> faster catalog access...
I want to index access more cache entries on cache miss for 7.0.
--
Bruce Momjian | http://www.op.net/~candle
maillist(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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