Jack, Surprisingly, vmstat provides some idea of OS Waits - look under the 'procs - r b w' columns (running, blocked, swapped).
John Kanagaraj Oracle Applications DBA DBSoft Inc (W): 408-970-7002 Want to know about a carpenter who built a bridge with two sticks and three nails? Write me for details! ** The opinions and statements above are entirely my own and not those of my employer or clients ** > -----Original Message----- > From: Jack Silvey [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, July 23, 2002 8:58 AM > To: Multiple recipients of list ORACLE-L > Subject: IO wait > > > All, > > We are tuning a new vital process on our data > warehouse, and it is IO intensive - lots of parallel > direct reads and writes. During our testing we are > driving IO wait to ~60% (per top). > > questions: > > 1) is top a valid measure of IO wait? > 2) Is a high io wait an issue to be concerned about? > 3) how else can it be accurately measured? > 4) How can I link IO wait to what is happening inside > the database? > > Thanks, > > Jack > > __________________________________________________ > Do You Yahoo!? > Yahoo! Health - Feel better, live better > http://health.yahoo.com > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Jack Silvey > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing Lists > -------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: John Kanagaraj INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
