A simple script that shows the Java process: port, program name, process number, memory usage

when using netstat query port, always can not see the name of the program, you must also cooperate with PS to the process number intersection, a two can, often need to see the words are silly, this script is to solve such a pain point, especially to optimize the Java program memory. on a night of Black nights, I had a long-running awk code, and finally did it, and after several optimizations, the execution was very fast.

#!/bin/Bashnetstat-tunlp2>/dev/NULL|awk-V page= ' getconf page_size '-F"[/ ]+" '$ (NF-1) = = "Java" {Sub"^0.0.0.0","*",$4) printf"%s%s%20s%s%6s",$1,$6~/[0-9]+/?"Unconn":$6,$4, $ (nf-1), $ (nf-2) System ("r= (' </proc/"($ (nf-2))"/statm ');p rintf '%5s ' $[${r[1]}*"PAGE"/1048576]")) printf"M"System ("readlink-f/proc/"($ (nf-2))"/CWD"))}'

Process parsing:

Display the TCP and UDP sockets for the system: NETSTAT-TUNLP:
To assign a memory page size to Awk's page variable:-v page= ' getconf page_size '
Replace 0.0.0.0 with an asterisk: Sub ("^0.0.0.0", "*", $4)
Print process number, socket, listening status: printf "%s%s%20s%s%6s", $1,$6~/[0-9]+/? " Unconn ": $6,$4,$ (NF-1), $ (NF-2) calls the system command process memory Usage: Systems ((" R= "($ (</proc/)) ' NF-2 ');p/statm ' rintf '%5s" Page "/1048576]"))
Call the system command to query the name of the Java process: System ("Readlink-f/proc/" ($ (NF-2)) "/CWD") did you write a good article? Please sweep the author's begging code below to encourage the author to continue sharing

A simple script that shows the Java process: port, program name, process number, memory usage