JVM性能监控

 #JVM性能监控
Young GC  counts
sudo  /usr/local/jdk1.7.0_21/bin/jstat -gcutil $(pgrep java)|tail -1|awk '{print  $6}'

Full GC  counts
sudo  /usr/local/jdk1.7.0_21/bin/jstat -gcutil $(pgrep java)|tail -1|awk '{print  $8}'

JVM total  memory usage
sudo  /usr/local/jdk1.7.0_21/bin/jmap -histo $(pgrep java)|grep Total|awk '{print  $3}'

JVM total  instances usage
sudo  /usr/local/jdk1.7.0_21/bin/jmap -histo $(pgrep java)|grep Total|awk '{print  $2}'