Re: [squid-users] aio_queue_request: WARNING - Disk I/O overloading

From: Jens-Uwe Walther <>
Date: Mon, 26 Mar 2001 09:42:26 +0200 (MEST)


I have a Solaris 8 and use already "logging,dfratime" as mount options!

                dfratime | nodfratime
                      By default, writing access time updates to
                      the disk may be deferred (dfratime) for the
                      file system until the disk is accessed for
                      a reason other than updating access times.
                      nodfratime disables this behavior.

                      By default, the file system is mounted with
                      normal access time
                       (atime) recording. If noatime is
                      specified, the file system will ignore
                      access time updates on files, except when
                      they coincide with updates to the ctime or
                      mtime. See stat(2). This option reduces
                      disk activity on file systems where access
                      times are unimportant (for example, a
                      noatime turns off access time recording
                      regardless of dfratime or nodfratime.
I don't know if the cache algorithm needs the atime on the cache dir files?! So
maybe "nodfratime" is a little bit "safer" then "noatime".
But now that I have three cache directories located on three different disks
iostat's "asvc_t" is faster.

Received on Mon Mar 26 2001 - 02:51:05 MST

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