| Bug #35919 | Graph iowait % in EM | ||
|---|---|---|---|
| Submitted: | 8 Apr 2008 23:24 | Modified: | 9 Apr 2008 4:44 |
| Reporter: | Adam Dixon | Email Updates: | |
| Status: | Verified | Impact on me: | |
| Category: | MySQL Enterprise Monitor: Web | Severity: | S4 (Feature request) |
| Version: | OS: | Any | |
| Assigned to: | CPU Architecture: | Any | |
Thank you for a reasonable feature request.
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Description: graph that shows iowait % on a per disk level. (Not satisfied by the CPU graphs IO plot). It seems fair as a large % of DB slow down is when servers have high IO wait on disk(s). Plotting the values such as; # iostat -x Linux 2.6.22.9-61.fc6 (dixon) 04/09/2008 avg-cpu: %user %nice %system %iowait %steal %idle 1.50 0.01 1.24 0.72 0.00 96.54 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 1.62 8.07 2.16 1.40 379.05 75.85 127.58 0.21 57.93 4.53 1.62 dm-0 0.00 0.00 3.75 9.48 378.96 75.85 34.38 3.53 266.61 1.22 1.62 dm-1 0.00 0.00 0.00 0.00 0.01 0.01 8.00 0.00 7.40 1.51 0.00 The util (last column, second section) column I find most useful. These would be really good alarms to fire on high % values too. How to repeat: . Suggested fix: Add IOwait graphs to monitor multiple disks on a system.