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Type:
Question
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Resolution: Incomplete
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Priority:
Major - P3
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Affects Version/s: 2.4.8
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Component/s: Performance
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3
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Hi,
I have a problem.The mongodb server is a machine with 32G of memory,but recently the use of resident memory is small less than 8G.This problem causes high page default.
But on the server no other process consumes memory.I am confused.
The output of some informations about the os and process:
[root@dal05mgo05 ~]# free -m
total used free shared buffers cached
Mem: 32073 31880 193 0 26 30642
-/+ buffers/cache: 1212 30861
Swap: 4095 0 4095
[root@dal05mgo05 ~]# cat /proc/meminfo |egrep -i mapped
Mapped: 7100988 kB
[root@dal05mgo05 ~]# mongostat -ucaoqing -p
connected to: 127.0.0.1
Enter password:
insert query update delete getmore command flushes mapped vsize res faults locked db idx miss % qr|qw ar|aw netIn netOut conn set repl time
1 74 11 *0 33 43|0 0 231g 463g 8.03g 779 PCMDB:0.0% 0 0|0 8|0 54k 33m 152 rs_main PRI 04:36:02
*0 85 16 *0 44 25|0 0 231g 463g 7.96g 848 PCMDB:0.9% 0 5|0 8|1 52k 25m 152 rs_main PRI 04:36:03
1 98 20 *0 51 32|0 0 231g 463g 8.01g 571 PCMDB:2.0% 0 0|0 8|0 76k 25m 153 rs_main PRI 04:36:04
*0 106 24 *0 68 41|0 0 231g 463g 8.02g 572 PCMDB:3.1% 0 0|0 8|0 88k 25m 152 rs_main PRI 04:36:05
2 78 23 *0 70 43|0 0 231g 463g 8.1g 677 PCMDB:1.3% 0 2|0 8|1 84k 25m 152 rs_main PRI 04:36:06
*0 72 11 *0 33 29|0 0 231g 463g 8.11g 572 PCMDB:3.1% 0 17|0 9|0 43k 33m 152 rs_main PRI 04:36:07
[root@dal05mgo05 ~]# top
top - 04:38:51 up 374 days, 4:03, 4 users, load average: 7.99, 10.88, 10.03
Tasks: 576 total, 1 running, 575 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.6%us, 0.3%sy, 0.0%ni, 92.3%id, 5.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32843352k total, 32636324k used, 207028k free, 31612k buffers
Swap: 4194296k total, 0k used, 4194296k free, 31375100k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13425 mongod 20 0 463g 6.8g 6.6g S 59.3 21.7 71:08.37 mongod
467 root 39 19 0 0 0 S 1.0 0.0 5748:27 kipmi0
25647 root 20 0 19692 1764 1032 R 0.7 0.0 0:00.07 top
354 root 20 0 0 0 0 S 0.3 0.0 227:24.17 kswapd0
355 root 20 0 0 0 0 S 0.3 0.0 228:56.67 kswapd1
2380 root 20 0 0 0 0 S 0.3 0.0 264:08.46 jbd2/sda5