CLI tool that reports information about processes, memory, paging, block IO, traps, and cpu activity

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2
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1answer
222 views

inonice not working properly in xen dom0

I have a Xen Dom0 (3.2) with a bunch of domUs (paravirt). DomU VBDs are on local LVM volumes. Now I want to get backups of the LVM volumes using snapshots. I use rsync ioniced to idle (ionice -c3). I ...
1
vote
1answer
70 views

Advice on web server performance troubleshooting is needed

I'm renting a virtual CentOS based server where I have about 5 active sites running. Several months ago I noticed a significant performance degradation in how my sites are running. First symptom was ...
0
votes
1answer
82 views

how can I tell if there is a cpu trashing on my linux machine

I want to write a script that will kill my processes when my machine is doing "too much" swapping of process memory from disk to memory. What is the best way to determine that? I saw top has %wa and ...
0
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1answer
518 views

VMstat explanation needed

can somebody explain me this graph please? What does it show? What those green peaks mean?
0
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1answer
631 views

How do I troubleshoot high vmstat sy

I have a Solaris server with very high vmstat sy time. What tools can I use to identify which process is causing the high system cpu usage? kthr memory page disk ...
2
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0answers
68 views

how to efficiently monitor system stat using vmstat?

Am getting the real-time memory stats from vmstat command. I did this using following steps: $nohup vmstat 60 > vmstatrecord.app & the command executes in background and writes the log to ...
0
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0answers
10 views

vmstat uninterruptable sleep calculation vs. wa

How is uninterruptable sleep calculated? Is the 'b' figure a reasonable figure to estimate the number of processes waiting for I/O over the course of that second? For a synthetic test : i=1; while ...