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0
votes
1answer
800 views

SNMP monitoring of iostat on a Solaris 10 server?

I'm looking at the System Management Agent resources which gives guidance to the Solaris SNMP tools however after extensive googling I can't find any OID reference list or details on what can be ...
10
votes
3answers
3k views

Extremely Slow IO with Simple PostgreSQL 8.4.4 Queries on Centos 5.5

The strange and extremely slow IO pattern I'm seeing is this (output of iostat -dxk 1 /dev/xvdb1): Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm ...
0
votes
1answer
157 views

Counting And Summing Disk IOs in Windows

Among other (see a post of mine) I am trying to count and add the number of bytes read/written to a disk during a minute/hour/day/... on windows. According to the Physical Disk Object documentation ...
0
votes
2answers
4k views

Windows: record I/O stats (eqivalent to iostat)

Are there any tools on Windows that allow performance statistics to be recorded? Something similar to iostat 10 > iostat.log on Unix? I have 10 Windows VMs that run a whole lot of regression ...
2
votes
2answers
3k views

What do the columns in you get from iostat mean?

When I perform the command iostat -x | grep -P 'Device|x.\s' I get the following columns as output device rrqm/s wrqm/s r/s w/s rsec/s wsec/s avrq-sz ...
3
votes
7answers
7k views

How do I tell which processes are writing heavily to disk in CentOS 5?

Our server started getting slow, so I ran iostat on it. iostat -dx 5 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 ...
1
vote
2answers
244 views

Finding throuput of CPU and Hardrive on Solaris

How do I find the throughput of a CPU and the hard disk on an OpenSolaris machine? Using mpstat or iostat? I'm having a hard time identifying the throughput if it is given at all in the commands ...
9
votes
2answers
16k views

can someone explain IOSTAT ouput?

i'am having IBM server with Redhat 5 ElsmP connected to the IBM Storage over iSCSI (in sdb ) can someone explain this output from iostat command avg-cpu: %user %nice %system %iowait %steal ...
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 ...
2
votes
3answers
11k 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 ...
12
votes
4answers
23k 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 ...
6
votes
3answers
10k 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 ...