Linux优化

来源：互联网发布：pump it up 2004 编辑：程序博客网时间：2024/06/11 13:38

磁盘

df -l

查看硬盘使用情况

详情请看磁盘管理http://blog.csdn.net/xuansiyu/article/details/28867065

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ps 进程

查看ora进程

ps -ef|grep ora

kill -9 进程号

批量杀ora进程

kill -9 `ps -ef |grep ora | grep -v gep |awk ' {print $2}'`

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内存

free -m

[oracle@hngdcrm xxx]$ free -m
             total       used       free     shared    buffers     cached
Mem:         16042       7233       8808          0         48       6442
-/+ buffers/cache:        742      15299
Swap:         5951          0       5951

主要看Swap

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vmstat

[oracle@hngdcrm xxx]$ vmstat 1 5 1秒钟刷新一次，5次循环
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b   swpd   free   buff cache   si   so    bi    bo   in   cs us sy id wa st
0 0      0 9023016 50644 6600624    0    0    42    47    0    6 9 1 86 3 0
0 0      0 9022892 50644 6600648    0    0     0     0 1083 572 1 1 99 0 0
0 0      0 9022892 50644 6600648    0    0     4   108 1098 609 6 1 92 1 0
0 0      0 9023404 50644 6600652    0    0     4    28 1096 806 11 2 87 1 0
0 0      0 9023404 50652 6600644    0    0     4   208 1117 674 11 1 86 1 0

看swap的换页频率

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top

[oracle@hngdcrm xxx]$ top
top - 15:55:18 up 17 days, 11:31, 2 users, load average: 1.64, 0.67, 0.64
Tasks: 276 total,   1 running, 275 sleeping,   0 stopped,   0 zombie
Cpu(s): 9.7%us, 1.2%sy, 0.0%ni, 88.5%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 16427416k total, 7416424k used, 9010992k free,    51252k buffers
Swap: 6094840k total,        0k used, 6094840k free, 6602228k cached

PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
1867 oracle    15   0 12872 1236 808 R 0.3 0.0   0:00.04 top
    1 root      15   0 10348 684 576 S 0.0 0.0   3:26.32 init
    2 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 migration/0
    3 root      34 19     0    0    0 S 0.0 0.0   0:00.55 ksoftirqd/0
    4 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 watchdog/0
    5 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 migration/1
    6 root      34 19     0    0    0 S 0.0 0.0   0:00.28 ksoftirqd/1
    7 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 watchdog/1
    8 root      RT -5     0    0    0 S 0.0 0.0   0:00.00 migration/2

设置：

刷新频率按s 输入秒数默认3秒

分类排序：cpu百分率按 P 内存使用百分率 M

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