0
votes
2answers
69 views

vmstat spend writing/reading explaination

I ran vmstat -D for 1s interval and take the different of milli reading/writing between two interval. Then I start copy a file to test. bytes write per secs is 23.9M/s, and mili writing is 7244. As ...
0
votes
1answer
71 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
408 views

Huge CS value in #vmstat - what does it mean?

Here is the output for #vmstat for my VPS (Parallels virtualization): procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so ...
0
votes
1answer
305 views

Top showing 64% idle on first screen or batch run, while there is no idle time at all

I'm running a quite heavy number crunching thing on a few 4 core servers, all running Ubuntu Precise Pangolin LTS 64 bit, in the cloud (so I suppose in a virtualized environment). To monitor the cpu ...
0
votes
1answer
169 views

running vmstat around a command

Im trying to automate a long list of database experiments. I would like to save vmstat output while specific parts of the experiments are running. Does something exist along the lines of time(1) or ...
4
votes
1answer
5k views

Server load high, CPU idle. NFS the cause?

I am running into a scenario where I'm seeing a high server load (sometimes upwards of 20 or 30) and a very low CPU usage (98% idle). I'm wondering if these wait states are coming as part of an NFS ...
1
vote
2answers
3k views

Interpretation of non-zero vmstat “bi/bo” values

What are useful rule-of-thumbs with regard to interpreting non-zero vmstat "bi/bo" values? When are the values "okay" and when are they an indication of that the system is under heavy stress? The ...
1
vote
1answer
694 views

Interpretation of non-zero vmstat “si/so” values

What are useful rule-of-thumbs with regard to interpreting non-zero vmstat "si/so" values? When are the values "okay" and when are they an indication of that the memory situation is problematic? The ...
0
votes
6answers
1k views

Chop headers off of vmstat command?

Is there a way to run the VMSTAT command (or something like it) and have a timestamp be included in the line? I know that I can pipe the output of the command and manipulate the results, but if I do ...
5
votes
2answers
5k views

How would you interpret the following vmstat output?

Consider the following five machines (named c, h, j, s and u) and their respective vmstat 1 outputs. Given the information from the vmstat output: Which machines would you consider being in a good ...
6
votes
2answers
13k views

How to get % memory usage with vmstat?

I need to get a memory usage in % from vmstat, but I don't quite understand some of the numbers relating to memory displayed in vmstat. In particular, given an output like this procs ...
3
votes
5answers
2k views

vmstat -f shows large number of forks

I have a production server that is showing a very large number of forks when running vmstat -f. Any suggestions on steps that could be used to help find out what the origin of the forks are? vmstat ...