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

learn more… | top users | synonyms

2
votes
1answer
166 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 ...
2
votes
1answer
243 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
67 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
118 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
116 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
votes
1answer
713 views

VMstat explanation needed

can somebody explain me this graph please? What does it show? What those green peaks mean?
0
votes
1answer
1k 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 ...
3
votes
0answers
86 views

On Linux, what is the size of pages reported by vmstat command and/or /proc/vmstat?

As many have stated on StackExchange and elsewhere, a typical kernel/mmu page size for Linux is 4 KiB. I have verified that this is the case on my OS/architecture (RHEL 6.6, Intel Xeon E5-2690). Now ...
0
votes
0answers
16 views

runqueue length in vmstat and sar

i am looking at the vmstat output to assess certain performance degradation on our systems, specifically for long runqueue. i find frequently it looks like this on a 8 CPU m/c: Mon Jun 13 12:14:02 ...