1
vote
1answer
44 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 ...
2
votes
1answer
605 views

Very long IO wait times

Following scenario has happened twice with different RAID controllers. One was LSI MegaRAID running RAID5, the second was HP Smart Array E200i running RAID1. At first server works smoothly for few ...
2
votes
2answers
528 views

The CPU idle is set to 99 while using vmstat, what does this mean?

I am confused with the CPU idle time is set to 99. Does this mean the CPU is idle not doing anything for 99% of the time? #vmstate procs -----------memory---------- ---swap-- -----io---- --system-- ...
1
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3answers
406 views

How much resources does vmstat really use?

We have a server running Tru64 Unix, which is our main production server for a single application our organisation uses. The software vendor has complete control of the hardware and software (we ...
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 ...