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2
votes
1answer
1k views

Is disk dying? Weird numbers on iostat

I have this old P4 box in my house with Ubuntu Server on it I use as a media server. Apart from the IDE boot drive there is a 1TB SATA disk attached with one of those el-cheapo IDE to SATA adapters ...
1
vote
3answers
8k views

Trouble interpreting iostat's tps measure

Prelude: I dumped a 5.2 GB database using the mysqldump command. I did this on an underpowered virtual server with only 512 MB of memory. It took about an hour. I'm now reloading that database on my ...
9
votes
4answers
16k views

How can I map iostat device names to LVM /dev/mapper/XXX names?

mount shows mount devices like: /dev/mapper/VolGroup01-LogVol00 on /var type ext3 (rw) or /dev/mapper/VolGrp_backups-backups on /mnt/backups type ext3 (rw) but iostat uses dm- notation. like ...
5
votes
3answers
9k views

What does it mean if iostat shows 100% busy wait but the CPU is completely idle?

What does it mean if iostat shows 100% busy wait but the CPU is completely idle? My application runs for a while, then goes into this state periodically for about 10-20 seconds. It is transaction ...