From: przemol (przemolicc@poczta.fm)
Date: Tue Dec 28 2004 - 08:35:23 EST
Sparc server + Solaris 9. There is daily backup at the server done using ufsdump.
But for a few days I noticed that speed of the backup (reported by ufsdump itself)
is lowered, that is at the end of its work ufsdump shows:
DUMP: 95.82% done, finished in 0:18
DUMP: 97.42% done, finished in 0:11
DUMP: 99.57% done, finished in 0:01
DUMP: 118524734 blocks (57873.41MB) on 1 volume at 2182 KB/sec
When I looked at log of each backup I noticed:
DUMP: 115871358 blocks (56577.81MB) on 1 volume at 3659 KB/sec
DUMP: 117732798 blocks (57486.72MB) on 1 volume at 3846 KB/sec
DUMP: 119616190 blocks (58406.34MB) on 1 volume at 3593 KB/sec
DUMP: 119345214 blocks (58274.03MB) on 1 volume at 3511 KB/sec
DUMP: 120715710 blocks (58943.22MB) on 1 volume at 3717 KB/sec
DUMP: 119813182 blocks (58502.53MB) on 1 volume at 3513 KB/sec
DUMP: 117722302 blocks (57481.59MB) on 1 volume at 3530 KB/sec
DUMP: 117993406 blocks (57613.97MB) on 1 volume at 3770 KB/sec
DUMP: 119807230 blocks (58499.62MB) on 1 volume at 3836 KB/sec
DUMP: 122314878 blocks (59724.06MB) on 1 volume at 3606 KB/sec
DUMP: 122046270 blocks (59592.91MB) on 1 volume at 3579 KB/sec
DUMP: 122824574 blocks (59972.94MB) on 1 volume at 2110 KB/sec <<<<<< !!!
DUMP: 121487230 blocks (59319.94MB) on 1 volume at 2301 KB/sec
DUMP: 118413054 blocks (57818.87MB) on 1 volume at 2078 KB/sec
DUMP: 118743486 blocks (57980.22MB) on 1 volume at 2155 KB/sec
DUMP: 120442174 blocks (58809.66MB) on 1 volume at 2224 KB/sec
DUMP: 123470142 blocks (60288.16MB) on 1 volume at 2127 KB/sec
DUMP: 125308350 blocks (61185.72MB) on 1 volume at 2103 KB/sec
DUMP: 123020222 blocks (60068.47MB) on 1 volume at 2112 KB/sec
DUMP: 120073982 blocks (58629.87MB) on 1 volume at 2040 KB/sec
DUMP: 116689406 blocks (56977.25MB) on 1 volume at 2156 KB/sec
DUMP: 118524734 blocks (57873.41MB) on 1 volume at 2182 KB/sec
Can someone explain me why it could slow down so much ? How can I diagnose it ?
How can I find what caused the problem ?
przemol
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