On Monday we had a very strange problem on one of our servers. %iostat values reported by sar
dramatically increased the values and stayed at that range. After long investigation I could not find any problem that could be causing such a havy IO load and then I noticed, that the output of iostat
and sar
differ for %iostat values.
It appears that older version of sar
could have some kind of overflow problem that makes it show invalid data values after kind of long time after system startup.
Updating sar
to the newer version helped this (or maybe just reset the counters somehow)
2007-12-12
sar monitoring failure
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приветствую в новом блоге :)
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