Operating system CPU mpstat top load average pidstat dstat -vr strace---> debug if system CPU usage % is high but if you dont know then use strace -tp `grep testdb1 2>&1 | head 100 debug if User CPU usage % is high but if you dont know then use 6. jobs (hit enter) 6.1 perf record -F 99 -a -g --sleep 10 (Profiling ) 6.2 perf report -n --stdio 6.3 ./perf-tools/execsnoop Memory vmstat I/O iostat -xmd 1 iotop Network sar -n DEV 1 mtr netstat -antpl | grep 1521 nmcli device status ethtool iperf3 -c 10.1.90.51 https://www.youtube.com/watch?v=eWUeJBAiX80 fs.aio-max-nr--> Async I/O max fs.file-max --> Max file open kernal.shmmin --> how many program segment can access(permission) the shared memory kernal.shmall --> maximum amount of shared memory can accessed by all the process other than OS(set to sum of all SGAs on the server divided by page size – ‘getconf PAGESIZE’) kernal.shmmax --> maximum amount of shared memory can accessed by ind...
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