On the sar front, you watch out for avgqu-sz (and/or await and svctm) suddenly increasing as tps increases. The queue length is like the "load factor", where <= 1 is good, 4 is bad, and more is evil. --dave On 2018-08-20 12:18 a.m., Kevin Cozens via talk wrote:
On 2018-08-19 11:53 AM, D. Hugh Redelmeier via talk wrote:
But I think that my system's bottleneck is often disk I/O. sysmon has no strip chart for that. [snip] Do you have any suggestions for a simple (possibly simplistic) tool to show disk bottlenecks in real time?
A quick internet search suggests you should look at the sar command that is part of sysstat.
-- David Collier-Brown, | Always do right. This will gratify System Programmer and Author | some people and astonish the rest davecb@spamcop.net | -- Mark Twain