I rent a CentOS service, and with no permission creat a swap
, now I now I am slow open my site, slow access with putty
. When I tried many times, finally see my root
part with putty
Here is a list of system situation by top
commond, I am not sure why my centos system caused out of memory
? (2G memory used) And how to avoid out of memory
?Any good way to release memory when it nearly out of? Thanks.
Tasks: 390 total, 1 running, 389 sleeping, 0 stopped, 0 zombie
Cpu(s): 11.8%us, 2.4%sy, 0.0%ni, 85.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2097152k total, 2097152k used, 0k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 0k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
18362 mysql 15 0 774m 307m 6532 S 99.8 15.0 177:06 mysqld
20047 root 18 0 29780 12m 6256 S 4.3 0.6 0:00.42 php
17644 root 18 0 33380 16m 6412 S 3.0 0.8 0:04.25 php
20168 root 16 0 31896 15m 6360 S 2.3 0.7 0:02.30 php
18219 root 18 0 32376 15m 6400 S 1.7 0.8 0:02.68 php
18394 root 18 0 32116 15m 6408 S 1.0 0.8 0:02.35 php
20097 root 15 0 33020 16m 6360 S 1.0 0.8 0:03.05 php
20159 root 15 0 2504 1244 812 R 0.7 0.1 0:00.48 top
17972 root 15 0 33368 16m 6404 S 0.3 0.8 0:02.46 php
19492 root 15 0 31860 15m 6408 S 0.3 0.7 0:01.92 php
1 root 18 0 2156 664 576 S 0.0 0.0 0:26.77 init
1215 root 15 -4 2260 652 436 S 0.0 0.0 0:00.00 udevd
1303 root 22 0 3880 1424 796 S 0.0 0.1 0:00.00 crond
1305 root 15 0 30780 13m 6116 S 0.0 0.7 0:10.62 php
1573 root 25 0 3880 1424 796 S 0.0 0.1 0:00.00 crond
1574 root 18 0 32152 15m 6360 S 0.0 0.7 0:11.36 php
1585 root 25 0 2832 868 700 S 0.0 0.0 0:00.00 xinetd
EDIT:
stoped mysqld
, sort RES
from top
20190 root 18 0 38256 6400 S 21m 0.0 1.0 0:04.74 php
20189 root 15 0 37004 6408 S 20m 0.0 1.0 0:04.17 php
19827 root 15 0 36212 6400 S 19m 0.0 1.0 0:06.29 php
20047 root 15 0 35412 6408 S 18m 0.0 0.9 0:03.09 php
20211 root 15 0 34968 6408 S 18m 0.0 0.9 0:01.53 php
20213 root 18 0 34684 6724 S 18m 0.0 0.9 0:25.12 php
16258 root 18 0 33636 6408 S 17m 0.0 0.8 0:06.29 php
20177 root 18 0 33380 6408 S 16m 0.0 0.8 0:03.93 php
21969 root 18 0 33348 6400 S 16m 0.0 0.8 0:01.27 php
21813 root 18 0 33152 6408 S 16m 0.0 0.8 0:02.50 php
20227 root 15 0 33152 6404 S 16m 0.0 0.8 0:03.39 php
21876 root 18 0 33004 6404 S 16m 0.0 0.8 0:01.22 php
21747 root 15 0 32596 6732 S 16m 0.0 0.8 0:19.16 php
21762 root 15 0 32872 6404 S 16m 0.0 0.8 0:02.05 php
7821 root 18 0 32920 6360 S 16m 0.0 0.8 0:03.27 php
13783 root 18 0 32920 6360 S 16m 0.0 0.8 0:03.37 php
20066 root 18 0 32984 6360 S 16m 0.0 0.8 0:02.66 php
15511 root 18 0 32916 6356 S 16m 0.0 0.8 0:09.72 php
21771 root 18 0 32912 6400 S 16m 0.0 0.8 0:02.45 php
EDIT 2:
Tasks: 217 total, 1 running, 216 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2097152k total, 983132k used, 1114020k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 0k cached
Answer
This looks like mySQL ate up your memory. Lower the memory amount that mysql is allowed to use. The configuration file should be found at /etc/my.cnf.
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