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
233 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
38 views

Two identical servers, one of them have 2x CPU load

Http requests are splitted 50/50 between two servers. Servers are running FreeBSD 9.2, their hardware, software & application configurations are absolutely identical. But one of servers is getting ...
1
vote
1answer
84 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
88 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
581 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
786 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
votes
0answers
89 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
103 views

understand FreeBSD vmstat output about meory

My Dell PowerEdge server has 24GB memory and 6GB swap. It has some VirtualBox vms (virtual machines), one vm is assigned 10GB memory and no swap. Right now the vm is slow, the vm's vmstat output is: ...
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15 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 ...