JIRA 4.0 : Testing Disk Access Speed
This page last changed on Jan 22, 2008 by idaniel.
We have a utility that you can run to get disk access times. Use it if JIRA or Confluence is running slowly and you suspect that disk access speed is the culprit (or you want to rule it out). Run it from the machine that JIRA or Confluence is running on, from the directory you have downloaded support-tools.jar to. java -Djava.io.tmpdir=<index directory> -jar support-tools.jar This should give you a result like: GoodLinux Workstation AMy local machine, which is not slow: TOTALS ---- ---- ---- ---- ---- stat avg median min max ---- ---- ---- ---- ---- open 75,830 62,000 44,000 2,869,000 r/w 46,407 40,000 35,000 907,000 close 5,751 5,000 4,000 336,000 to delete 118,942 81,000 65,000 22,864,000 ---- ---- ---- ---- ---- All times are in nanoseconds. Linux Workstation BTOTALS ---- ---- ---- ---- ---- stat avg median min max ---- ---- ---- ---- ---- open 32,254 29,916 18,610 692,447 r/w 23,676 20,309 17,888 411,218 close 4,857 4,374 3,617 221,829 delete 36,232 34,753 22,000 425,200 ---- ---- ---- ---- ---- All times are in nanoseconds. BadTOTALS ---- ---- ---- ---- ---- stat avg median min max ---- ---- ---- ---- ---- open 275,886 267,184 246,412 2,544,101 r/w 92,956 81,538 70,727 7,358,896 close 3,194,958 3,177,771 3,076,064 4,331,872 delete 542,650 530,271 514,226 1,771,416 ---- ---- ---- ---- ---- All times are in nanoseconds. This site had REALLY fast disks..... with a virus scanner turned on... Why would disk access be slow?Some things that can cause slow disk access are:
VMWareBecause we get asked how JIRA performs when running in a VMWare image, here are some results for VMWare. These images were both running on Linux Workstation B. Windows in VMWareTOTALS ---- ---- ---- ---- ---- stat avg median min max ---- ---- ---- ---- ---- open 593,183 548,114 426,591 8,659,481 r/w 173,372 159,517 10,895 1,954,718 close 174,506 141,079 29,333 17,045,183 delete 405,493 372,673 14,248 7,665,499 ---- ---- ---- ---- ---- All times are in nanoseconds. Linux in VMWareTOTALS ---- ---- ---- ---- ---- stat avg median min max ---- ---- ---- ---- ---- open 84,324 46,000 35,000 16,700,000 r/w 124,550 50,000 41,000 61,272,000 close 17,936 16,000 14,000 961,000 delete 64,528 49,000 36,000 3,603,000 ---- ---- ---- ---- ---- All times are in nanoseconds. This shows that, at least in our testing, you should not run JIRA in VMWare, as disk access, is much slower than on a native operating system installation. See Also |
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Document generated by Confluence on Oct 06, 2009 00:26 |