Re: [PERFORM] Sequential Scan with LIMIT

2004-10-25 Thread Curt Sampson
t-oriented SQL while you're at it: SELECT DISTINCT(col) FROM mytable WHERE col = 'myval' cjs -- Curt Sampson <[EMAIL PROTECTED]> +81 90 7737 2974 http://www.NetBSD.org Make up enjoying your city life...produced by BIC CAMERA ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster

Re: [PERFORM] First set of OSDL Shared Mem scalability results, some

2004-10-24 Thread Curt Sampson
On Sun, 24 Oct 2004, Tom Lane wrote: > Considering that the available numbers suggest we could win just a few > percent... I must confess that I was completely unaware of these "numbers." Where do I find them? cjs -- Curt Sampson <[EMAIL PROTECTED]> +81 90 7737 2974

Re: [PERFORM] First set of OSDL Shared Mem scalability results, some

2004-10-24 Thread Curt Sampson
ce. (If a page has a write queue, you might as well leave it with the page after flushing it, and get rid of it only when the page leaves memory.) I see the OS issues related to mapping that much memory as a much bigger potential problem. cjs -- Curt Sampson <[EMAIL PROTECTED]> +81

Re: [PERFORM] First set of OSDL Shared Mem scalability results, some

2004-10-23 Thread Curt Sampson
locking issues alone would be painful. I don't see why they would be any more painful than the current locking issues. In fact, I don't see any reason to add more locking than we already use when updating pages. cjs -- Curt Sampson <[EMAIL PROTECTED]> +81 90 7737 2974 http

Re: [PERFORM] First set of OSDL Shared Mem scalability results, some

2004-10-23 Thread Curt Sampson
ousands or tens of thousands of small mappings (certainly NetBSD isn't), but I've never done any performance tests to see what kind of strategies might work well or not. cjs -- Curt Sampson <[EMAIL PROTECTED]> +81 90 7737 2974 http://www.NetBSD.org Make up enjoying your city