Overview
dstat is a good tool for replacing vmstat, netstat, iostat, and ifstat. It it a very lightweight tool that can consolidate and correlate data that you would normally have to capture in different terminals.
Examples
RMAN Backup Throughput
I’ve used dstat before in the past to monitor backup throughput over interfaces. Of course, this is possible if the backups are going to disk.
Run ifconfig to get the name of the interface you want to monitor.
Run dstat and watch the receive and send columns.
dstat -cn -N bond0.133 -C total -f 5 ----total-cpu-usage---- net/bond0.1 usr sys idl wai hiq siq| recv send 6 7 83 4 0 0| 0 0 11 40 44 5 0 0|1303k 1686k 14 39 40 7 0 0|5295k 6131k 11 36 47 6 0 0|1733k 3630k 10 34 51 5 0 0|2334k 11M 8 32 54 5 0 0|2189k 14M 6 10 78 6 0 0|1418k 25M 6 0 86 7 0 0|1277k 1563k 8 1 84 8 0 0|1847k 2013k 8 1 84 7 0 0|1831k 4063k 13 47 35 5 0 0|1974k 7948k 12 28 55 5 0 0|1269k 16M 10 19 64 7 0 0|1308k 2674k 10 11 73 7 0 0|1474k 2590k 15 65 18 3 0 0|1566k 4440k
CPU, Load, Disk I/O and Memory
Running “dstat -h” will show the options available. Below is a script that shows some of the options I normally use.
cat dstat.sh
#!/bin/sh
echo
dstat -h | egrep "time|load|proc|cpu|disk|io|sys|vm" | egrep -v "cpu0|aio|filesystem|epoch|Usage"
echo
CURRENT_TIME=`date +"%m_%d_%Y_%H_%M"`
#dstat --time --load -p -c --disk --mem --top-cpu --top-bio --top-latency --output /home/oracle/rick/log/dstat_output_${CURRENT_TIME}_.csv 10
#dstat --time --load -p -c --disk --mem --top-cpu --top-bio --top-latency 10
dstat --time --load --proc --cpu --top-cpu --disk --io --sys --vm 60
exit 0
Below that is a sample run on a busy server.
./dstat.sh Versatile tool for generating system resource statistics Dstat options: -c, --cpu enable cpu stats -d, --disk enable disk stats -l, --load enable load stats -p, --proc enable process stats -r, --io enable io stats (I/O requests completed) -t, --time enable time/date output -y, --sys enable system stats --vm enable vm stats -v, --vmstat equals -pmgdsc -D total ----system---- ---load-avg--- ---procs--- ----total-cpu-usage---- -most-expensive- -dsk/total- --io/total- ---system-- -----virtual-memory---- date/time | 1m 5m 15m |run blk new|usr sys idl wai hiq siq| cpu process | read writ| read writ| int csw |majpf minpf alloc free 15-10 14:17:19|15.9 21.3 24.1|0.0 0.0 150| 6 7 83 4 0 0|ora_as04_LASP0.2| 89M 33M|1141 1095 | 24k 21k| 0 31k 52k 52k 15-10 14:18:19|30.5 24.5 25.0| 13 6.2 465| 8 15 72 5 0 0|oracleORCL 1.0| 32M 21M|1674 1273 | 43k 31k| 0 122k 91k 91k 15-10 14:19:19|22.8 23.0 24.5| 11 4.6 473| 6 12 77 5 0 0|oracleORCL 1.0| 25M 15M|1645 1062 | 40k 30k| 0 115k 82k 84k 15-10 14:20:19|23.6 22.9 24.3| 12 5.2 476| 6 13 76 5 0 0|oracleORCL 1.2| 66M 13M|1716 1127 | 40k 29k| 0 117k 86k 86k 15-10 14:21:19|14.9 20.5 23.4|5.3 5.2 467| 3 6 86 5 0 0|oracleORCL 0.4| 28M 14M|1530 1069 | 32k 26k| 0 99k 57k 57k 15-10 14:22:19|20.5 20.6 23.2|8.8 6.4 466| 5 10 80 5 0 0|oracleORCL 0.8| 70M 20M|1824 1296 | 39k 32k| 0 104k 73k 73k 15-10 14:23:19|15.7 19.2 22.6| 12 7.3 476| 6 12 76 6 0 0|oracleORCL 1.5| 39M 18M|1840 1218 | 41k 33k| 0 117k 89k 89k 15-10 14:24:19|15.8 18.6 22.2| 12 7.5 278| 7 11 75 6 0 0|oracleORCL 1.3| 160M 95M|2142 885 | 37k 30k| 0 64k 77k 77k 15-10 14:25:19|28.2 22.4 23.3| 18 7.5 203| 8 22 65 5 0 0|oracleORCL 1.1| 98M 58M|2608 684 | 42k 31k| 0 70k 110k 110k 15-10 14:26:19|31.6 23.8 23.7| 12 6.8 176| 7 13 75 5 0 0|oracleORCL 1.1| 54M 14M|1944 715 | 30k 25k| 0 39k 56k 57k missed 2 ticks 15-10 14:27:19|32.0 26.4 24.6| 18 4.8 200| 6 20 70 4 0 0|oracleORCL 0.9| 30M 17M| 932 1214 | 37k 27k| 0 72k 98k 98k 15-10 14:28:19|50.7 32.5 26.8| 26 5.3 227| 10 34 52 4 0 0|oracleORCL 1.3| 55M 20M|1200 1088 | 47k 25k| 0 108k 152k 152k missed 2 ticks 15-10 14:29:19|35.4 31.4 26.8| 22 4.5 217| 7 26 64 3 0 0|oracleORCL 0.8| 13M 22M|1071 1113 | 40k 23k| 0 94k 127k 127k 15-10 14:30:19|30.9 30.8 26.8| 20 3.5 212| 11 23 63 3 0 0|oracleORCL 1.5| 70M 16M|1062 1426 | 37k 20k| 0 83k 98k 98k missed 2 ticks 15-10 14:31:19|26.7 28.9 26.4| 10 2.4 182| 7 11 79 3 0 0|oracleORCL 1.0| 38M 16M| 786 892 | 27k 19k| 0 59k 59k 59k 15-10 14:32:19|15.7 25.4 25.4| 18 2.5 208| 6 23 69 2 0 0|oracleORCL 0.7| 53M 16M| 577 1012 | 33k 17k| 0 85k 107k 108k
