Mongodb cpu 150%?

  mongodb, question

Mongodb’s cpu usage has been very high and has remained at 150% for a long time. Accurately speaking, the cpu time slice is occupied. The server used is a 4-core physical machine. The cpu is occupied between 30% and 40%. I don’t know whether this is normal.

Service reading and writing are not particularly high.

top

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1025 mongodb 20 0 7632304 340452 291908 S 157.8 4.2 87414:58 mongod

mongostat

insert query update delete getmore command flushes mapped vsize res faults qr|qw ar|aw netIn netOut conn time

*0    *0     *0     *0       0 26181|0       0   3.5G  7.3G 334.0M      0   0|0   0|0    3m     2m   28 18:20:00
 *0    *0     *0     *0       0 22740|0       0   3.5G  7.3G 334.0M      0   0|0   0|0    2m     1m   28 18:20:01
 *0    *0     *0     *0       0 19667|0       1   3.5G  7.3G 334.0M      0   0|0   0|0    2m     1m   28 18:20:02
 *0    *0     *0     *0       0 19194|0       0   3.5G  7.3G 334.0M      0   0|0   0|0    2m     1m   28 18:20:03
 *0    *0     *0     *0       0 19212|0       0   3.5G  7.3G 334.0M      0   0|0   1|0    2m     1m   28 18:20:04
 *0    *0     *0     *0       0 19168|0       0   3.5G  7.3G 334.0M      0   0|0   1|0    2m     1m   28 18:20:05
 *0    *0     *0     *0       0 19205|0       0   3.5G  7.3G 334.0M      0   0|0   0|0    2m     1m   28 18:20:06
 *0    *0     *0     *0       0 19207|0       0   3.5G  7.3G 334.0M      0   0|0   1|0    2m     1m   28 18:20:07
 *0    *0     *0     *0       0 19218|0       0   3.5G  7.3G 334.0M      0   0|0   0|0    2m     1m   28 18:20:08
 *0    *0     *0     *0       0 19206|0       0   3.5G  7.3G 334.0M      0   0|0   1|0    2m     1m   28 18:20:09

mongotop

ns    total     read    write    2015-09-16T18:21:42+08:00

log_inst.log_inst_2015_09_16 185ms 185ms 0ms
log_info.log_info_2015_09_16 164ms 164ms 0ms
log_data.log_data_2015_09_16 163ms 163ms 0ms

pprt.pprt_sub    130ms    130ms      0ms
 pprt.pprt_hub    128ms    128ms      0ms
 admin.system.roles      0ms      0ms      0ms
 admin.system.version      0ms      0ms      0ms
 local.startup_log      0ms      0ms      0ms
 local.system.indexes      0ms      0ms      0ms
 local.system.namespaces      0ms      0ms      0ms

UseiostatIs there something wrong with the system I/O?