ZMEM内存查看工具使用

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1 安装zmem工具

yum install smem -y
zmem 特性
系统概况列表
按进程、映射和用户列表
按用户、映射或用户过滤
来自多个数据源的可配置列
可配置的输出单位和百分比
可配置的标题和总和
从/proc读取活动数据
从目录镜像或经过压缩的打包文件读取数据快照
面向嵌入式系统的轻型捕获工具
内置的图表生成功能

2 内存相关的指标

# smem
  PID User     Command                         Swap      USS      PSS      RSS
 7907 www      php-fpm: pool www               8224        4        5      412
 
PID       进程
USER      所属用户
Command   命令
Swap      交换分区
USS       Residentset size      使用top命令可以查询到，是最常用的内存指标，表示进程占用的物理内存大小，RSS中包含了各进程间共享的内存
PSS       Proportionalset size  它将共享内存的大小进行平均后，再分摊到各进程上去
RSS       Unique set size       是PSS中自己的部分，只计算了进程独自占用的内存大小，不包含任何共享的部分
单位为 KB

3 使用方法

# smem -h
Usage: smem [options]
 
Options:
  -h, --help            show this help message and exit
  -H, --no-header       disable header line
  -c COLUMNS, --columns=COLUMNS
                        columns to show
  -t, --totals          show totals
  -R REALMEM, --realmem=REALMEM
                        amount of physical RAM
  -K KERNEL, --kernel=KERNEL
                        path to kernel image
  -m, --mappings        show mappings
  -u, --users           show users
  -w, --system          show whole system
  -P PROCESSFILTER, --processfilter=PROCESSFILTER
                        process filter regex
  -M MAPFILTER, --mapfilter=MAPFILTER
                        map filter regex
  -U USERFILTER, --userfilter=USERFILTER
                        user filter regex
  -n, --numeric         numeric output
  -s SORT, --sort=SORT  field to sort on
  -r, --reverse         reverse sort
  -p, --percent         show percentage
  -k, --abbreviate      show unit suffixes
  --pie=PIE             show pie graph
  --bar=BAR             show bar graph
  -S SOURCE, --source=SOURCE
                        /proc data source
 
 
查看每个进程使用的内存
smem
# smem
  PID User     Command                         Swap      USS      PSS      RSS
 7907 www      php-fpm: pool www               8224        4        5      412
 
查看每个用户使用的内存
# smem -u
User     Count     Swap      USS      PSS      RSS
chrony       1      224      416      440     1312
dbus         1      308      568      682     1548
view         2        0     1608     2432     5488
polkitd      1     3832     4288     4403     5424
oubao        4        0     5496     7259    13552
www        116  1558664  1020840  1022731  1107504
root        56    54252 26784216 26828282 27015436
查看内存进程状态百分比
# smem -p
  PID User     Command                         Swap      USS      PSS      RSS
 7907 www      php-fpm: pool www              0.78%    0.00%    0.00%    0.00%
 
查看固件使用内存
# smem -R 32G  -w
Area                           Used      Cache   Noncache
firmware/hardware            775492          0     775492
kernel image                      0          0          0
kernel dynamic memory       4679248    3773032     906216
userspace memory           27858120      99880   27758240
free memory                  241572     241572          0
 
查看系统内存使用：
smem -w
Area                           Used      Cache   Noncache
firmware/hardware                 0          0          0
kernel image                      0          0          0
kernel dynamic memory       4652788    3748408     904380
userspace memory           27869796      99864   27769932
free memory                  256356     256356          0
 
# smem -w -p
Area                           Used      Cache   Noncache
firmware/hardware             0.00%      0.00%      0.00%
kernel image                  0.00%      0.00%      0.00%
kernel dynamic memory        14.20%     11.45%      2.75%
userspace memory             85.01%      0.30%     84.71%
free memory                   0.79%      0.79%      0.00%
 
查看内存只展示需要的列
# smem -c "pid uss"
  PID      USS
 7907        4
 
查看内存根据某一列排序  顺序
# smem -u -s uss
User     Count     Swap      USS      PSS      RSS
chrony       1      224      416      440     1312
dbus         1      308      568      682     1548
view         2        0     1608     2432     5488
polkitd      1     3832     4288     4403     5424
oubao        4        0     5496     7259    13552
www        116  1558664  1020844  1022735  1107508
root        56    54252 26782984 26827090 27014308
 
查看内存根据某一列排序  倒序
# smem -u -s uss -r
User     Count     Swap      USS      PSS      RSS
root        56    54252 26784368 26828474 27015696
www        116  1558660  1020848  1022739  1107512
oubao        4        0     5496     7259    13552
polkitd      1     3832     4288     4403     5424
view         2        0     1608     2432     5488
dbus         1      308      568      682     1548
chrony       1      224      416      440     1312
 
查看内存过滤进程查看
# smem -M java
  PID User     Command                         Swap      USS      PSS      RSS
 3850 root     /usr/local/jdk1.8/bin/java         0       20       24       92
 6135 root     /usr/local/jdk1.8/bin/java         0       20       24       88
 6478 root     /usr/local/jdk1.8/bin/java         0       20       24       92
10658 root     /usr/local/jdk1.8/bin/java         0       20       24       92
12035 root     /usr/local/jdk1.8/bin/java         0       20       24       92
12857 root     /usr/local/jdk1.8/bin/java         0       20       24       92
15878 root     /usr/local/jdk1.8/bin/java         0       20       24       88
19064 root     /usr/local/jdk1.8/bin/java         0       20       24       88
25653 root     /usr/local/jdk1.8/bin/java         0       20       24       88
25727 root     /usr/local/jdk1.8/bin/java         0       20       24       92
26798 root     /usr/local/jdk1.8/bin/java         0       20       24       92
31255 root     /usr/local/jdk1.8/bin/java         0       20       24       92
16192 root     /usr/local/jdk1.8/bin/java         0       20       33      120
 1610 root     /usr/local/jdk1.8/bin/java         0       20       49      152
31749 root     /usr/local/jdk1.8/bin/java         0       20       49      152
画图功功能不实用

来源：oschina

链接：https://my.oschina.net/54188zz/blog/3144943

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