请问怎么设置让系统cached的内存变小些?

显示全部楼层 · 2005-7-16 18:49:11

请问怎么设置让系统cached的内存变小些?
我们现在的系统总是因为内存不够而reboot 机器,red hat advance server2.1,请问有没有办法设置让cached 的内存变小些,要是有什么命令也行?

千问 · 2005-7-16 18:49:11

vi /etc/sysctl.conf
vm.pagecache=5 10 15

千问 · 2005-7-16 18:49:11

最初由 yimuniao 发布
[B]请问怎么设置让系统cached的内存变小些?
我们现在的系统总是因为内存不够而reboot 机器,red hat advance server2.1,请问有没有办法设置让cached 的内存变小些,要是有什么命令也行? [/B]
how much is your ram? and sga?
kernel can free cache if there is application requirement.
If you can show error msg, it would be
much helpful.

千问 · 2005-7-16 18:49:11

内存3.6g,sga 310m

千问 · 2005-7-16 18:49:11

最初由 yimuniao 发布
[B]内存3.6g,sga 310m [/B]
if your system are not running other big programs, it's not likely
that memory problem cause your system crash ( unless something
exceptional ).
show your result of top or sar, to see what's going on.

千问 · 2005-7-16 18:49:11

11:28amup 9 days, 16:52,3 users,load average: 0.08, 0.02, 0.01
83 processes: 82 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 12.3% user,0.1% system,0.0% nice, 86.2% idle
CPU1 states: 13.0% user,0.3% system,0.0% nice, 85.2% idle
CPU2 states:0.0% user,0.0% system,0.0% nice, 100.0% idle
CPU3 states:0.1% user,0.1% system,0.0% nice, 99.1% idle
PID USER PRINISIZERSS SHARE STAT %CPU %MEM TIME COMMAND
1251 oracle18 0227M 195M194M S26.95.5 410:11 oracle
1249 oracle15 0113M92M 82796 S 0.32.6 0:35 oracle
1243 oracle15 0102M70M 71972 S 0.02.0 0:55 oracle
1253 oracle15 0 9710462M 63212 S 0.31.7 4:20 oracle
1237 oracle15 0 9232455M 56688 S 0.01.5 2:08 oracle
1245 oracle15 0 4944816M 16172 S 0.00.4 0:00 oracle
1247 oracle15 0 4776414M 14480 S 0.00.4 0:00 oracle
1241 oracle15 0 4384010M8956 S 0.00.3 0:06 oracle
1235 oracle15 0 41644 89008124 S 0.00.2 0:00 oracle
1239 oracle15 0 41720 88207056 S 0.30.2 2:54 oracle
30329 root15 06152 57243772 S 0.00.1 0:00 server
15348 root15 06176 56684024 S 0.00.1 0:00 server
30309 root15 05976 53123708 S 0.00.1 0:24 server
30310 root15 05976 53123708 S 0.00.1 0:01 server
30311 root15 05976 53123708 S 0.00.1 0:00 server
30312 root15 05976 53123708 S 0.00.1 0:00 server
30313 root15 05976 53123708 S 0.00.1 9:28 server
30314 root15 05976 53123708 S 0.00.1 0:00 server
30315 root15 05976 53123708 S 0.00.1 0:00 server
30316 root15 05976 53123708 S 0.00.1 0:00 server
30317 root15 05976 53123708 S 0.00.1 0:00 server
30318 root15 05976 53123708 S 0.00.1 0:06 server
30319 root15 05976 53123708 S 0.00.1 0:06 server
30320 root15 05976 53123708 S 0.00.1 0:06 server
30321 root15 05976 53123708 S 0.00.1 0:05 server
30322 root15 05976 53123708 S 0.00.1 0:06 server
30323 root15 05976 53123708 S 0.00.1 0:06 server
30324 root15 05976 53123708 S 0.00.1 0:06 server
30325 root15 05976 53123708 S 0.00.1 0:05 server
30326 root15 05976 53123708 S 0.00.1 0:05 server
30327 root15 05976 53123708 S 0.00.1 0:05 server
30330 root15 05960 48803688 S 0.00.1 0:00 server

千问 · 2005-7-16 18:49:11

run "free" to show memory usage.
And in oracle user account, type "ulimit -a"

千问 · 2005-7-16 18:49:11

[root@DBServer root]# free

total used free sharedbuffers cached
Mem: 3605516359209213424 282324 2147682967412
-/+ buffers/cache: 4099123195604
Swap:1602413080 2944

千问 · 2005-7-16 18:49:11

[oracle@DBServer root]$ ulimit -a
core file size (blocks) 0
data seg size (kbytes)unlimited
file size (blocks)
unlimited
max locked memory (kbytes)unlimited
max memory size (kbytes)unlimited
open files
1024
pipe size (512 bytes) 8
stack size (kbytes) 8192
cpu time (seconds)
unlimited
max user processes
14335
virtual memory (kbytes) unlimited

千问 · 2005-7-16 18:49:11

Can you explain why swap is so small? because of big ram?