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标题: 应用服务器内存在使用率多少时考虑增加? [打印本页]

作者: 路人呵呵 时间: 2014-02-27 16:13
标题: 应用服务器内存在使用率多少时考虑增加?
这是今天的内存使用情况,我按实际内存/物理内存*100得出来的使用率.这样对吗?
想询问下内存使用率大于多少时考虑申请加内存?
--------------2014-02-27 00:02:01----------------
00:00:01 up 14 days,  6:58,  1 user,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  4.1%us,  0.5%sy,  0.0%ni, 95.3%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3605412    317688       0    173168 1149072
-/+ buffers/cache: 2283172 1639928
Swap:    4063224    16600 4046624
networks
0

--------------2014-02-27 02:02:01----------------
02:00:01 up 14 days,  8:58,  1 user,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  4.1%us,  0.5%sy,  0.0%ni, 95.3%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3610776    312324       0    173532 1155980
-/+ buffers/cache: 2281264 1641836
Swap:    4063224    16564 4046660
networks
0

--------------2014-02-27 04:02:01----------------
04:00:01 up 14 days, 10:58,  1 user,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  4.0%us,  0.5%sy,  0.0%ni, 95.3%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3734988    188112       0    174012 1281032
-/+ buffers/cache: 2279944 1643156
Swap:    4063224    16560 4046664
networks
0

--------------2014-02-27 06:02:01----------------
06:00:01 up 14 days, 12:58,  1 user,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  4.0%us,  0.5%sy,  0.0%ni, 95.4%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3728260    194840       0    174356 1287968
-/+ buffers/cache: 2265936 1657164
Swap:    4063224    16560 4046664
networks
0

--------------2014-02-27 08:02:01----------------
08:00:01 up 14 days, 14:58,  1 user,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  4.0%us,  0.5%sy,  0.0%ni, 95.4%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3738084    185016       0    174776 1294880
-/+ buffers/cache: 2268428 1654672
Swap:    4063224    16560 4046664
networks
0

--------------2014-02-27 10:02:01----------------
10:00:01 up 14 days, 16:58,  3 users,  load average: 0.06, 0.03, 0.00
cpu
Cpu(s):  4.0%us,  0.5%sy,  0.0%ni, 95.4%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3781200    141900       0    175120 1302024
-/+ buffers/cache: 2304056 1619044
Swap:    4063224    16560 4046664
networks
10

--------------2014-02-27 12:02:01----------------
12:00:01 up 14 days, 18:58,  3 users,  load average: 0.00, 0.00, 0.00
cpu
Cpu(s):  3.9%us,  0.5%sy,  0.0%ni, 95.4%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
memory
         total    used    free    shared buffers    cached
Mem:    3923100 3622540    300560       0    175288 1284596
-/+ buffers/cache: 2162656 1760444
Swap:    4063224    16636 4046588
networks
0
----------------------------------------------

作者: q1208c 时间: 2014-02-27 16:26
精心优化过的代码, 对于内存是有适应性的.

至于你想用多少内存, 这取决于你的代码情况. 如果你的代码只是用来处理 web请求, 不考虑cache的情况下, 内存的使用跟并发连接数基本上是线性关系. 你可以自己测试并分析你的数据.

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