pmap命令 查看进程用了多少内存
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 device format. 显示设备格式
-q quiet Do not display some header/footer lines. 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 of map 映像起始地址
Kbytes: size of map in kilobytes 映像大小
RSS: resident set size in kilobytes 驻留集大小
Dirty: dirty pages (both shared and 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
应用示例:
[root@GameServer-1 ~]# pmap -d 16845 16845: /usr/local/src/percona-5.6.23/bin/mysqld --defaults-file=/data/perconadata_3307/my.cnf --basedir=/usr/local/src/percona-5.6.23 --datadir=/data/perconadata_3307 --plugin-dir=/usr/local/src/percona-5.6.23/lib/mysql/plugin --user=mysql --log-error=/data/perconadata_3307/mysql-error.log --open-files-limit=10240 --pid-file=/data/perconadata_3307/mysql.pid --socket=/data/perconadata_3307/mysql.sock --port=3307 Address Kbytes Mode Offset Device Mapping 0000000000400000 11752 r-x-- 0000000000000000 0fc:00001 mysqld 0000000001179000 1696 rw--- 0000000000b79000 0fc:00001 mysqld 0000000001321000 412 rw--- 0000000001321000 000:00000 [ anon ] 0000000016e8d000 128032 rw--- 0000000016e8d000 000:00000 [ anon ] 0000003aacc00000 4 r-x-- 0000000000000000 0fc:00001 libaio.so.1.0.1 0000003aacc01000 2044 ----- 0000000000001000 0fc:00001 libaio.so.1.0.1 0000003aace00000 4 rw--- 0000000000000000 0fc:00001 libaio.so.1.0.1 0000003b56200000 112 r-x-- 0000000000000000 0fc:00001 ld-2.5.so 0000003b5641c000 4 r---- 000000000001c000 0fc:00001 ld-2.5.so 0000003b5641d000 4 rw--- 000000000001d000 0fc:00001 ld-2.5.so 0000003b56600000 1340 r-x-- 0000000000000000 0fc:00001 libc-2.5.so 0000003b5674f000 2048 ----- 000000000014f000 0fc:00001 libc-2.5.so 00002b1df9c30000 256 rw--- 00002b1df9c30000 000:00000 [ anon ] 00002b1dfc000000 50280 rw--- 00002b1dfc000000 000:00000 [ anon ] 00002b1dff11a000 15256 ----- 00002b1dff11a000 000:00000 [ anon ] 00002b1e00000000 37860 rw--- 00002b1e00000000 000:00000 [ anon ] 00002b1e024f9000 27676 ----- 00002b1e024f9000 000:00000 [ anon ] 00007fffddc79000 84 rw--- 00007ffffffe9000 000:00000 [ stack ] 00007fffddcd1000 12 r-x-- 00007fffddcd1000 000:00000 [ anon ] ffffffffff600000 8192 ----- 0000000000000000 000:00000 [ anon ] mapped: 3407988K writeable/private: 3262376K shared: 0K
最后一行的参数:
mapped:表示该进程映射的虚拟地址空间大小,也就是该进程预先分配的虚拟内存大小,即ps出的vsz
writeable/private : 表示进程所占用的私有地址空间大小,也就是该进程实际使用的内存大小
shared : 表示进程和其他进程共享的内存大小