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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 ...
10
votes
4answers
17k 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 ...