I read somewhere that vmstat's 'wa' (% of time waiting for I/O) is % of time Linux was found not idle but nothing was ready to run until some I/O had completed.
-------------------------------------------------------- This e-mail, including any attachments, may be confidential, privileged or otherwise legally protected. It is intended only for the addressee. If you received this e-mail in error or from someone who was not authorized to send it to you, do not disseminate, copy or otherwise use this e-mail or its attachments. Please notify the sender immediately by reply e-mail and delete the e-mail from your system. -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of CHAPLIN, JAMES (CTR) Sent: Tuesday, March 25, 2008 7:01 AM To: LINUX-390@VM.MARIST.EDU Subject: Re: Question on measuring CPU Usage in Linux We are using RHEL 5.0 & 4.5 (pending if using Oracle or not). So I am assuming the information form PERFKIT is the best measure of CPU Usage? I am trying to understand the "waiting for I/O" value of CPU, is this CPU unable to process other work? James Chaplin Systems Programmer, MVS, zVM & zLinux Base Technologies, Inc (703) 921-6220 -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Mark Post Sent: Monday, March 24, 2008 5:37 PM To: LINUX-390@VM.MARIST.EDU Subject: Re: Question on measuring CPU Usage in Linux >>> On Mon, Mar 24, 2008 at 4:04 PM, in message <[EMAIL PROTECTED]>, "CHAPLIN, JAMES (CTR)" <[EMAIL PROTECTED]> wrote: > Under Linux we have the command vmstat (and others) that display the CPU > usage. What version of what distribution do you have? Anything prior to SLES10 and RHEL5, the data from inside the guest is pretty much meaningless. Mark Post ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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 ---------------------------------------------------------------------- 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
