Are there any tools that can be used to check memory utilization?

Red Hat Linux内存使用率检查工具

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原文链接：https://access.redhat.com/solutions/39355

文章标签：

#check #memory #utilization

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本文介绍了一系列用于查看Red Hat Enterprise Linux系统内存利用率的命令行工具，包括ps、free、cat /proc/meminfo、cat /proc/slabinfo、vmstat及sar等，这些工具可以帮助用户详细了解系统的虚拟内存、物理内存、交换区使用情况，以及slab缓存的统计信息。

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Are there any tools that can be used to check memory utilization?

SOLUTION 已验证 - 已更新 2014年三月29日02:01 -

English

环境

Red Hat Enterprise Linux 4
Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6

问题

System is facing high memory utilization, what are the tools that can be used to view it?

决议

Following commands can be used to see the memory utilization:

Report usage of each prosess's VIRT (virtual memory size) and RSS (resident set size.)
Raw
```
# ps aux
```
Report short summary of memory utilization statistics.
Raw
```
# free
```
Report details of memory utilization statistics.
Raw
```
# cat /proc/meminfo
```
Report details of slab utilization statistics.
Raw
```
# cat /proc/slabinfo
```
Report virtual memory statistics.
Raw
```
# vmstat
```
Report virtual memory statistics iteratively (the example's sampling is 5 seconds.)
Raw
```
# vmstat 5
```
Report memory and swap space utilization statistics iteratively (the example's sampling is 5 seconds and, count is 10.)
Raw
```
# sar -r 5 10
```

Comments

Refer man pages for more information.

Raw

*   PS(1) (\`man ps\`)
*   FREE(1) (\`man free\`)
*   PROC(5) (\`man proc\`)
*   SLABINFO(5) (\`man slabinfo\`)
*   VMSTAT(8) (\`man vmstat\`)
*   SAR(1) (\`man sar\`)