Java program various monitoring commands and troubleshooting methods

1, the monitoring process GC situation:

Jstat-gcutil PID Frequency
Example: Jstat-gcutil 3807 2s

2. Monitor Cup and Memory:
Command: Top,vmstat,nmon
Tools: JVISUALVM, Jprofile,perfnom,btrace,loadrunner

3, monitoring Io:iostat

iostat-d-x-k 1 10

4, monitoring network: Ifstat,iftop,nethogs

Monitor overall bandwidth using ――nload, Bmon, Slurm, Bwm-ng, CBM, speedometer, and netload

Monitor overall bandwidth usage (batch output) ――vnstat, Ifstat, Dstat, and Collectl

Bandwidth per socket connection using ――iftop, Iptraf, Tcptrack, Pktstat, Netwatch, and Trafshow

Bandwidth usage for each process ――nethogs

5. Memory leak: Generate dump file, use IBM parser, MAT,JPROFILE,JVISUALVM view reason.

6. Thread Blocking:

JVISUALVM can view thread blocking conditions, print thread dump

7. Database

Oracle: Print an AWR report to analyze the specific cause.

Mysql:

Redis: Monitoring Tool Redis-stat

View Redis connections, number of used memory, blocking connections, and more

./redis-cli-h 192.168.9.32 Info | Grep-e "Connected_clients"-E "blocked_clients"-E
"Used_memory_human"-E "Used_memory_peak_human"-E "rejected_connections"-E "Evicted_keys"-e "instantaneous"-e "mem_ Fragmentation_ratio "-E" used_memory "-E" Used_memory_rss "

Mongodb:

Java program various monitoring commands and troubleshooting methods