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119 lines
4.6 KiB
Markdown
119 lines
4.6 KiB
Markdown
flsf
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Linux Pmap Command – Find How Much Memory Process Use
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================================================================================
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Pmap provide memory map of a process, The pmap command display the memory usage map of a process or multiple processes. Pmap reports information about the address space or memory usage map of a process. Pmap is actually a Sun OS command and Linux supports only very limited number of features. But it is very helpful for finding the complete address space of a process. To check [memory usage of process][1] we need PID or unique process ID of running process, we can get PID from /proc or regular commands like top or ps.
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### Syntax or usage ###
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#pmap PID
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or
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#pmap [options] PID
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In outout it display total address, kbytes, mode and mapping.
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### Options ###
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-x extended Show the extended format.
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-d device Show the device format.
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-q quiet Do not display some header/footer lines.
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-V show version Displays version of program.
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### Memory usage map of single process ###
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[root@info ~]# pmap 1013
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1013: /usr/sbin/sshd
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00110000 1480K r-x– /usr/lib/libcrypto.so.1.0.0
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00282000 80K rw— /usr/lib/libcrypto.so.1.0.0
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00296000 12K rw— [ anon ]
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00299000 36K r-x– /lib/libkrb5support.so.0.1
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002a2000 4K rw— /lib/libkrb5support.so.0.1
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002a3000 16K r-x– /lib/libplc4.so
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002a7000 4K rw— /lib/libplc4.so
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002ab000 88K r-x– /lib/libaudit.so.1.0.0
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002c1000 4K r—- /lib/libaudit.so.1.0.0
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002c2000 4K rw— /lib/libaudit.so.1.0.0
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002c3000 216K r-x– /lib/libgssapi_krb5.so.2.2
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002f9000 4K rw— /lib/libgssapi_krb5.so.2.2
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002fa000 808K r-x– /lib/libkrb5.so.3.3
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003c4000 24K rw— /lib/libkrb5.so.3.3
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003ca000 152K r-x– /lib/libk5crypto.so.3.1
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003f0000 4K rw— /lib/libk5crypto.so.3.1
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003f1000 92K r-x– /usr/lib/libnssutil3.so
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00738000 4K r—- /lib/libresolv-2.12.so
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00739000 4K rw— /lib/libresolv-2.12.so
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0073a000 8K rw— [ anon ]
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00825000 120K r-x– /lib/ld-2.12.so
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00843000 4K r—- /lib/ld-2.12.so
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00844000 4K rw— /lib/ld-2.12.so
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0090d000 32K r-x– /lib/libwrap.so.0.7.6
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00915000 4K rw— /lib/libwrap.so.0.7.6
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00948000 484K r-x– /usr/sbin/sshd
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009c1000 8K rw— /usr/sbin/sshd
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009c3000 20K rw— [ anon ]
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009e0000 92K r-x– /lib/libpthread-2.12.so
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009f7000 4K r—- /lib/libpthread-2.12.so
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total 8232K
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### Memory usage map of multiple processes ###
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We can check memory map of multiple processes by inserting multiple PIDs. Add multiple PIDs with adding space.
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pmap 1013 1217 1118
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### Extended memory map about a process ###
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[root@info ~]# pmap -x 1013
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1013: /usr/sbin/sshd
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Address Kbytes RSS Dirty Mode Mapping
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00110000 1480 92 0 r-x– libcrypto.so.1.0.0
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00282000 80 80 80 rw— libcrypto.so.1.0.0
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00296000 12 8 4 rw— [ anon ]
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00299000 36 0 0 r-x– libkrb5support.so.0.1
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002a2000 4 4 4 rw— libkrb5support.so.0.1
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002a3000 16 0 0 r-x– libplc4.so
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002a7000 4 4 4 rw— libplc4.so
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002ab000 88 4 0 r-x– libaudit.so.1.0.0
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002c1000 4 4 4 r—- libaudit.so.1.0.0
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002c2000 4 4 4 rw— libaudit.so.1.0.0
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002c3000 216 4 0 r-x– libgssapi_krb5.so.2.2
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002f9000 4 4 4 rw— libgssapi_krb5.so.2.2
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002fa000 808 4 0 r-x– libkrb5.so.3.3
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003c4000 24 24 24 rw— libkrb5.so.3.3
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003ca000 152 4 0 r-x– libk5crypto.so.3.1
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003f0000 4 4 4 rw— libk5crypto.so.3.1
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003f1000 92 0 0 r-x– libnssutil3.so
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00408000 12 12 12 rw— libnssutil3.so
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0040b000 12 0 0 r-x– libplds4.so
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0040e000 4 4 4 rw— libplds4.so
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——– ——- ——- ——- ——-
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total kB 8232 – – -
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Here Address, Kbyte, Dirty, RSS, mode and mapping containd information as below
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### Extended and Device Format Fields ###
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Address: start address of map
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Kbytes: size of map in kilobytes
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RSS: resident set size in kilobytes
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Dirty: dirty pages (both shared and private) in kilobytes
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Mode: permissions on map: read, write, execute, shared, private (copy on write)
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Mapping: file backing the map, or ‘[ anon ]‘ for allocated memory, or ‘[ stack ]‘ for the program stack
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Offset: offset into the file
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Device: device name (major:minor)
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--------------------------------------------------------------------------------
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via: http://linoxide.com/linux-command/pmap-command/
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译者：[译者ID](https://github.com/译者ID) 校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[1]:http://www.linoxide.com/linux-shell-script/linux-memory-usage-program/
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