RHEL Kernel Performance Optimization, Characterization ... - Red Hat

iostat ­x of same IOzone EXT3 file systemIostat metricsrates perf secr|w rqm/s – request merged/sr|w sec/s – 512 byte sectors/sr|w KB/s – Kilobyte/sr|w /s – operations/ssizes and response timeaverq­sz – average request szavequ­sz – average queue szawait – average wait time mssvcm – ave service time msLinux 2.4.21­27.0.2.ELsmp (node1) 05/09/2005avg­cpu: %user %nice %sys %iowait %idle0.40 0.00 2.63 0.91 96.06Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq­sz avgqu­sz await svctm %utilsdi 16164.60 0.00 523.40 0.00 133504.00 0.00 66752.00 0.00 255.07 1.00 1.91 1.88 98.40sdi 17110.10 0.00 553.90 0.00 141312.00 0.00 70656.00 0.00 255.12 0.99 1.80 1.78 98.40sdi 16153.50 0.00 522.50 0.00 133408.00 0.00 66704.00 0.00 255.33 0.98 1.88 1.86 97.00sdi 17561.90 0.00 568.10 0.00 145040.00 0.00 72520.00 0.00 255.31 1.01 1.78 1.76 100.00