用法
pmap [ -x | -d ] [ -q ] pids...
pmap -V
选项含义
-x extended Show the extended format. 显示扩展格式
-d device Show the deviceformat. 显示设备格式
-q quiet Do not display some header/footerlines. 不显示头尾行
-V show version Displays version of program. 显示版本
扩展格式和设备格式域:
Address: start address ofmap 映像起始地址
Kbytes: size of map in kilobytes 映像大小
RSS: resident set size inkilobytes 驻留集大小
Dirty: dirty pages (both sharedand private) in kilobytes 脏页大小
Mode: permissions on map 映像权限: r=read,w=write, x=execute, s=shared, p=private (copy on write)
Mapping: file backing the map ,or '[ anon ]' for allocated memory, or '[ stack ]' for the program stack. 映像支持文件,[anon]为已分配内存[stack]为程序堆栈
Offset: offset into the file 文件偏移
Device: device name(major:minor) 设备名
举例:
查看进程15675的tomcat设备格式
[root@VM_16_3_centos test]# pmap -d 15675
15675: /home/basefile/jdk1.8.0_191/bin/java -Djava.util.logging.config.file=/home/basefile/apache-tomcat-8.5.37/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /home/basefile/apache-tomcat-8.5.37/bin/bootstrap.jar:/home/basefile/apache-tomcat-8.5.37/bin/tomcat-juli.jar -Dcatalina.base
Address Kbytes Mode Offset Device Mapping
0000000000400000 4 r-x-- 0000000000000000 0fd:00001 java
0000000000600000 4 r---- 0000000000000000 0fd:00001 java
0000000000601000 4 rw--- 0000000000001000 0fd:00001 java
00000000016a8000 412 rw--- 0000000000000000 000:00000 [ anon ]
。。。
ffffffffff600000 4 r-x-- 0000000000000000 000:00000 [ anon ]
mapped: 2321500K writeable/private: 188116K shared: 2772K
[root@VM_16_3_centos test]#
每2秒打出15675设备的最后1行的值
[root@VM_16_3_centos test]# while true; do pmap -d 3066 | tail -1; sleep 2; done
其他查看jvm工具java jdk 自带: jconsole 、jvisualvm、verbose:gc
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作者:a_Ygygs_Dxdsr_XdMss
来源:CSDN
原文:https://blog.csdn.net/weixin_42749765/article/details/87519957
版权声明:本文为博主原创文章,转载请附上博文链接!