查看LINUX进程内存占用情况
查看下大致情况
可以看到总的62G，已经占用了57G
$ free -g
total used free shared buffers cached
Mem: 62 61 1 0 0 4
-/+ buffers/cache: 57 5
Swap: 7 0 7然后再看下，好像没什么有作用的信息，最大的是一个java进程，但是占用不大，而且不知道是什么进程
可以使用 ps -ef | grep java 查看java进程
$ top
top - 14:22:44 up 2224 days, 20:38, 1 user, load average: 4.94, 2.92, 2.53
Tasks: 260 total, 1 running, 259 sleeping, 0 stopped, 0 zombie
Cpu0 : 12.5%us, 0.0%sy, 0.0%ni, 87.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 25.0%us, 0.0%sy, 0.0%ni, 75.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 12.5%us, 0.0%sy, 0.0%ni, 87.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 6.2%us, 0.0%sy, 0.0%ni, 93.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 6.2%sy, 0.0%ni, 93.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 12.5%us, 0.0%sy, 0.0%ni, 87.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 6.7%us, 6.7%sy, 0.0%ni, 86.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu8 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu9 : 6.7%us, 0.0%sy, 0.0%ni, 93.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu10 : 11.8%us, 5.9%sy, 0.0%ni, 76.5%id, 0.0%wa, 0.0%hi, 5.9%si, 0.0%st
Cpu11 : 12.5%us, 0.0%sy, 0.0%ni, 87.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 65851056k total, 64071568k used, 1779488k free, 18484k buffers
Swap: 8388604k total, 0k used, 8388604k free, 4131116k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
8675 appweb 20 0 43.6g 16g 21m S 137.5 25.9 16674,01 java
20293 appweb 20 0 15168 1364 928 R 6.3 0.0 0:00.35 top
1 root 20 0 19232 980 688 S 0.0 0.0 0:09.52 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 117:04.43 migration/0
4 root 20 0 0 0 0 S 0.0 0.0 254:01.12 ksoftirqd/0
5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/0
6 root RT 0 0 0 0 S 0.0 0.0 2:48.04 watchdog/0
7 root RT 0 0 0 0 S 0.0 0.0 136:09.68 migration/1
8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/1
9 root 20 0 0 0 0 S 0.0 0.0 154:14.58 ksoftirqd/1
10 root RT 0 0 0 0 S 0.0 0.0 2:28.93 watchdog/1
11 root RT 0 0 0 0 S 0.0 0.0 139:15.16 migration/2
12 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/2
13 root 20 0 0 0 0 S 0.0 0.0 128:35.83 ksoftirqd/2
14 root RT 0 0 0 0 S 0.0 0.0 2:44.47 watchdog/2
15 root RT 0 0 0 0 S 0.0 0.0 145:29.92 migration/3
16 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/3
17 root 20 0 0 0 0 S 0.0 0.0 108:00.74 ksoftirqd/3
18 root RT 0 0 0 0 S 0.0 0.0 2:54.11 watchdog/3
19 root RT 0 0 0 0 S 0.0 0.0 155:30.92 migration/4
20 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/4然后再网上搜到了下面这个命令，rsz就是占用的内存
可以看到占用最大的一个进程是kafka_exporter这个进程占用了大概41G
$ ps -e -o 'pid,comm,args,pcpu,rsz,vsz,stime,user,uid' | sort -nrk5
28887 kafka_exporter /data/program/kafka/kafka_e 1.9 41362200 42096296 2021 appweb 500
8675 java /data/program/java/bin/java 219 17027528 45709020 2021 appweb 500
17447 java /data/program/java/bin/java 0.0 505416 8212604 2021 appweb 500
31061 filebeat /usr/share/filebeat/bin/fil 0.9 30420 43872 2019 root 0
23595 wsm-agent /data/program/wsm-agent/bin 0.2 25012 115628 2020 root 0
21653 SecAgent /opt/SecAgent/SecAgent 0.2 16280 988760 2019 root 0然后查看kafka相关的进程
可以看到就是这个pid为28887的进程kafka_exporter
于是 $ kill 28887
再次查看$ ps -ef| grep kafka
发现进程不存在了
$ ps -ef | grep kafka
appweb 21516 19509 0 14:24 pts/0 00:00:00 grep kafka
appweb 28887 1 1 2021 ? 6-03:26:55 /data/program/kafka/kafka_exporter-1.3.1.linux-amd64/kafka_exporter --kafka.server=10.1.120.6:9094
再次查看进程占用情况
发现free已经是45G了，比最开始多了40G
$ free -g
total used free shared buffers cached
Mem: 62 21 41 0 0 4
-/+ buffers/cache: 17 45
Swap: 7 0 7再次查看，发现占用进程也不在了
$ ps -e -o 'pid,comm,args,pcpu,rsz,vsz,stime,user,uid' | sort -nrk5
8675 java /data/program/java/bin/java 219 17029296 45746180 2021 appweb 500
17447 java /data/program/java/bin/java 0.0 505412 8212604 2021 appweb 500
31061 filebeat /usr/share/filebeat/bin/fil 0.9 30460 43872 2019 root 0
23595 wsm-agent /data/program/wsm-agent/bin 0.2 25016 115628 2020 root 0
21653 SecAgent /opt/SecAgent/SecAgent 0.2 16280 988760 2019 root 0
19509 bash -bash 0.0 1908 108472 14:18 appweb 500
2395 crond crond 0.0 1272 116892 2016 root 0
8445 sshd /usr/sbin/sshd 0.0 1124 66224 2016 root 0
1 init /sbin/init 0.0 1040 19232 2016 root 0
31060 filebeat-god /usr/share/filebeat/bin/fil 0.0 72 11388 2019 root 0
15463 sh sh socket.sh 0.1 1636 106492 2018 appweb 500
PID COMMAND COMMAND %CPU RSZ VSZ STIME USER UID
9 ksoftirqd/1 [ksoftirqd/1] 0.0 0 0 2016 root 0
99 cgroup [cgroup] 0.0 0 0 2016 root 0
993 ext4-dio-unwrit [ext4-dio-unwrit] 0.0 0 0 2016 root 0centos6 free 和 centos 7的free 的差异与对比 解决Linux系统buff/cache过大的问题 Linux命令free -h解释
【linux】free命令中cached和buffers的区别
Linux- 技术专题 -buffer/cache 理解 Linux 内存 Buffer 和 Cache Linux中Buffer和Cache的区别 Linux内存buffer和cache的区别 Buffer和Cache的区别(转)
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