On Mon, 11 Oct 2004 15:34:36 -0700, Johnny Walton <[EMAIL PROTECTED]> wrote:
> I can't seem to remember what all these entries mean. http://lxr.linux.no/source/Documentation/sysctl/vm.txt The 7th and 8th parameter seem to define the percentage of dirty that will kick in bdflush synchronously. The default for these is 60% and 20% so you want those to go down. We must not forget Marcy's warning about the 7700E. You do want to measure the I/O response of your DASD subsystem. The pure device response time may not be too helpful if you don't know how big the I/O is. Fortunately with ESCON this should be fairly easy: the connect time lets you compute the number of blocks per I/O. >From another issue I did learn that average I/O response has its limitations (e.g. when 1% of the I/O's takes 100 times as long - does not show in the average but is bad). > Thanks for sticking with me on this. My pleasure. It's much better to work on someone else's problem than to work on your own problems... ;-) > Could you email me a signed version;) Promised.. once we have sorted out this problem of yours. -- Rob van der Heij rvdheij @ gmail.com ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
