Linux下查看某个进程占用的CPU、内存 linux

1、用top命令指定固定的PID

top -p 10997

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查询指定进程的PID

ps -ef | grep zookeeper

jim1099719590 12月14 pts/200:00:01 /usr/lib/jvm/java-8-oracle/bin/java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /home/jim/opt/zookeeper-3.4.9/bin/../build/classes:/home/jim/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/home/jim/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/home/jim/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../conf: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /home/jim/opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

【Linux下查看某个进程占用的CPU、内存】2、使用ps查询指定进程名或者PID的占用情况

ps -aux | grep zookeeper

ps -aux | grep 2181

jim109970.00.1 11522940 65176 pts/2Sl12月140:01 /usr/lib/jvm/java-8-oracle/bin/java -Dzookeeper.log.dir=. -Dzookeeper.root.logger=INFO,CONSOLE -cp /home/jim/opt/zookeeper-3.4.9/bin/../build/classes:/home/jim/opt/zookeeper-3.4.9/bin/../build/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-log4j12-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/slf4j-api-1.6.1.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/netty-3.10.5.Final.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/log4j-1.2.16.jar:/home/jim/opt/zookeeper-3.4.9/bin/../lib/jline-0.9.94.jar:/home/jim/opt/zookeeper-3.4.9/bin/../zookeeper-3.4.9.jar:/home/jim/opt/zookeeper-3.4.9/bin/../src/java/lib/*.jar:/home/jim/opt/zookeeper-3.4.9/bin/../conf: -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.local.only=false org.apache.zookeeper.server.quorum.QuorumPeerMain /home/jim/opt/zookeeper-3.4.9/bin/../conf/zoo.cfg

10997为PID
0.0为CPU占用百分比（注意：如果有两个CPU，32核64线程，那么总占比是6400%）
0.1为内存占用百分比
3、查看更详细的内存占比

cat /proc/10997/status

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Name:java State:S (sleeping) Tgid:10997 Ngid:0 Pid:10997 PPid:1959 TracerPid:0 Uid:1000100010001000 Gid:1000100010001000 FDSize:256 Groups:4 24 27 30 46 113 128 130 132 134 1000 1002 NStgid:10997 NSpid:10997 NSpgid:10987 NSsid:10914 VmPeak:11522940 kB VmSize:11522940 kB VmLck:0 kB VmPin:0 kB VmHWM:65176 kB VmRSS:65176 kB VmData:11462972 kB VmStk:140 kB VmExe:4 kB VmLib:17064 kB VmPTE:460 kB VmPMD:28 kB VmSwap:0 kB HugetlbPages:0 kB Threads:25 SigQ:0/128292 SigPnd:0000000000000000 ShdPnd:0000000000000000 SigBlk:0000000000000000 SigIgn:0000000000000003 SigCgt:2000000181005ccc CapInh:0000000000000000 CapPrm:0000000000000000 CapEff:0000000000000000 CapBnd:0000003fffffffff CapAmb:0000000000000000 Seccomp:0 Cpus_allowed:ff Cpus_allowed_list:0-7 Mems_allowed:00000000,00000001 Mems_allowed_list:0 voluntary_ctxt_switches:86 nonvoluntary_ctxt_switches:2

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VmRSS为内存