slow tar performance on fbsd5
JG
jarek at adeon.lublin.pl
Fri Oct 14 03:06:37 PDT 2005
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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