Re[2]: slow tar performance on fbsd5

From: JG (jarek_at_adeon.lublin.pl)
Date: 10/14/05

  • Next message: Robert Watson: "Re: slow tar performance on fbsd5" 
    Date: Fri, 14 Oct 2005 12:06:59 +0200
To: freebsd-performance@freebsd.org

    Hello all,

    Seems that my problem with untarring is resolved!

    Firstly, Write Cache was disabled by default by my scsi controller.

    FreeBSD 5.4, WCE=0
    # time gtar -xf mysql-m.tgz
    1.207u 16.371s 7:01.06 4.1% 164+278k 8030+7176io 4pf+0w

    FreeBSD 5.4, WCE=1
    # time gtar -xf mysql-m.tgz
    1.217u 16.893s 3:24.51 8.8% 170+288k 8550+6355io 4pf+0w

    I've upgraded to RELENG_6 today.

    FreeBSD6 RC1, WCE=1

    # time gtar -xf mysql-m.tgz
    0.141u 2.836s 0:22.23 13.3% 177+284k 2+1298io 0pf+0w

    Unbeliveable! It's 22 seconds on FBSD6 versus 3 minutes and 24secs on FBSD5!

    BTW. If you want to turn write cache on, use:
    camcontrol modepage daX -m8 -P0 -e
    then put "1" after WCE in your favourite editor.

    Regards,
    JG

     

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  • Next message: Robert Watson: "Re: slow tar performance on fbsd5"