Server CPU usage is too high to troubleshoot and solve ideas

Discovery Server CPU usage is particularly high

Troubleshooting ideas:

-Use top or Mpstat to view CPU usage
# Mpstat-p All 2 1
Linux 2.6.32-358.el6.x86_64 (linux-host) 01/05/2016 _x86_64_ (CPU)

04:41:13 PM CPU%usr%nice%sys%iowait%irq%soft%steal%guest%idle
04:41:15 PM all 0.56 0.00 0.25 0.00 0.00 0.04 0.00 0.00 99.14
04:41:15 PM 0 3.08 0.00 1.03 0.00 0.00 0.51 0.00 0.00 95.38
04:41:15 PM 1 1.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.00
04:41:15 PM 2 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
04:41:15 PM 3 1.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.51
04:41:15 PM 4 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 5 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
04:41:15 PM 6 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
04:41:15 PM 7 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 8 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00
04:41:15 PM 9 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 11 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 12 1.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.00
04:41:15 PM 13 1.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.00
04:41:15 PM 14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 16 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 17 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 18 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 19 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50
04:41:15 PM 20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 21 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 22 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:41:15 PM 23 0.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.50

-top identify high-occupancy process IDs

-View the number of threads that the process occupies, such as Java:
# Ps-elf|grep Java|wc-l
1065

Solve the problem of uneven CPU usage or excessive usage

Taskset

Taskset is a command provided by Linux (Ubuntu system may need to install itself, Schedutils package). He can have a program run on some (or) of the CPUs.

1) shows the CPU the process is running on

# taskset-p 3495
PID 3495 ' s current affinity mask:ffffffff

Note: The ffffffff of the result is actually a binary 32 low-level 1 bitmask, each 1 corresponds to 1 CPUs, indicating that the process runs on 32 CPUs

2) Specify that the process is running on a specific CPU

# TASKSET-PC 3 3495

Show Results:

PID 3495 ' s current affinity list:0-31
PID 3495 ' s new affinity List:3

Note: 3 means that the CPU will only run on the 4th CPU (counting from 0)

3) Specify CPU when process starts

# taskset-c 1./redis-server. /redis.conf

Server CPU usage is too high to troubleshoot and solve ideas