iostat kullanımı:
$ iostat Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 194.72 1096.66 1598.70 2719068704 3963827344 sda1 178.20 773.45 1329.09 1917686794 3295354888 sda2 16.51 323.19 269.61 801326686 668472456 sdb 371.31 945.97 1073.33 2345452365 2661206408 sdb1 371.31 945.95 1073.33 2345396901 2661206408 sdc 408.03 207.05 972.42 513364213 2411023092 sdc1 408.03 207.03 972.42 513308749 2411023092
Sadece CPU kullanımını görmek
$ iostat -c Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76
Sadece disk I/O’unu görmek
$ iostat -d Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 194.71 1096.61 1598.63 2719068720 3963827704 sda1 178.20 773.41 1329.03 1917686810 3295355248 sda2 16.51 323.18 269.60 801326686 668472456 sdb 371.29 945.93 1073.28 2345452365 2661209192 sdb1 371.29 945.91 1073.28 2345396901 2661209192 sdc 408.01 207.04 972.38 513364213 2411024484 sdc1 408.01 207.02 972.38 513308749 2411024484
Network devicelarını ve NFS partitionlarının bilgilerini görmek:
$ iostat -n Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %sys %iowait %idle 4.33 0.01 1.16 0.31 94.19 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 2.83 0.35 5.39 29817402 457360056 sda1 3.32 50.18 4.57 4259963994 387641400 sda2 0.20 0.76 0.82 64685128 69718576 sdb 6.59 15.53 42.98 1318931178 3649084113 sdb1 11.80 15.53 42.98 1318713382 3649012985 Device: rBlk_nor/s wBlk_nor/s rBlk_dir/s wBlk_dir/s rBlk_svr/s wBlk_svr/s 192.168.1.4:/home/data 90.67 0.00 0.00 0.00 5.33 0.00 192.168.1.4:/backup 8.74 0.00 0.00 0.00 8.74 0.00 192.168.1.8:/media 0.02 0.00 0.00 0.00 0.01 0.00
MB cinsinden istatistikleri görmek
$ iostat -m Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: tps MB_read/s MB_wrtn/s MB_read MB_wrtn sda 194.70 0.54 0.78 1327670 1935463 sda1 178.19 0.38 0.65 936370 1609060 sda2 16.51 0.16 0.13 391272 326402 sdb 371.27 0.46 0.52 1145240 1299425 sdb1 371.27 0.46 0.52 1145213 1299425 sdc 407.99 0.10 0.47 250666 1177259 sdc1 407.99 0.10 0.47 250639 1177259
Belirli bir device ın istatistiklerini görmek
$ iostat -p sda Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 194.69 1096.51 1598.48 2719069928 3963829584 sda2 336.38 27.17 54.00 67365064 133905080 sda1 821.89 0.69 243.53 1720833 603892838
Genişletilmiş istatistikler için
$ iostat -x Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 27.86 63.53 61.77 132.91 1096.46 1598.40 13.84 0.21 1.06 2.28 44.45 sda1 0.69 33.22 48.54 129.63 773.30 1328.84 11.80 1.39 7.82 2.28 40.57 sda2 27.16 30.32 13.23 3.28 323.13 269.56 35.90 0.55 32.96 3.44 5.68 sdb 39.15 215.16 202.20 169.04 945.80 1073.13 5.44 1.05 2.78 1.64 60.91 sdb1 39.15 215.16 202.20 169.04 945.77 1073.13 5.44 1.05 2.78 1.64 60.91 sdc 8.90 3.63 356.56 51.40 207.01 972.24 2.89 1.04 2.56 1.55 63.30 sdc1 8.90 3.63 356.55 51.40 206.99 972.24 2.89 1.04 2.56 1.55 63.30
Belirli bir partition için istatistikler
$ iostat -x sda1 Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda1 0.69 33.21 48.54 129.62 773.23 1328.76 11.80 1.39 7.82 2.28 40.56
Belirli aralıklarla (2 saniyede bir) iostat çıktısnı güncellemek
$ iostat 2 Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 avg-cpu: %user %nice %system %iowait %steal %idle 5.68 0.00 0.52 2.03 0.00 91.76 Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn sda 194.67 1096.39 1598.33 2719070584 3963891256 sda1 178.16 773.26 1328.79 1917688482 3295418672 sda2 16.51 323.11 269.54 801326878 668472584 sdb 371.22 945.74 1073.08 2345454041 2661251200 sdb1 371.22 945.72 1073.08 2345398577 2661251200 sdc 407.93 207.00 972.19 513366813 2411036564 sdc1 407.93 206.98 972.19 513311349 2411036564 ..
2 saniyede birr 3 kere çalıştırmak
iostat 2 3
mpstat kullanmak
mpstat ile CPU kullanım istatistikleri toplanabilir
$ mpstat Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 10:25:32 PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s 10:25:32 PM all 5.68 0.00 0.49 2.03 0.01 0.02 0.00 91.77
Her core için bilgi toplamak
$ mpstat -P ALL Linux 2.6.32-100.28.5.el6.x86_64 (dev-db) 07/09/2011 _x86_64_ (4 CPU) 10:28:04 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 10:28:04 PM all 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.99 10:28:04 PM 0 0.01 0.00 0.01 0.01 0.00 0.00 0.00 0.00 99.98 10:28:04 PM 1 0.00 0.00 0.01 0.00 0.00 0.00 0.00 0.00 99.98 10:28:04 PM 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00 10:28:04 PM 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
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