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This article shares a sample analysis of the CentOS Performance Diagnostic Tool command set. Xiaobian thinks it is quite practical, so share it with everyone for reference. Let's follow Xiaobian and have a look.

#View current system load

uptime

#View system status and system resource usage for each process

top

#Visualize CPU usage

htop

#View load information for each CPU

mpstat -P ALL 1

#View disk IO statistics every 1 second

iostat -xkdz 1

#View virtual memory usage information every second

vmstat 1

#View memory usage statistics

free

#View network usage information

nicstat -z 1

#Tools like vmstat for display optimization

dstat 1

#View system activity status, such as system paging statistics, block device IO statistics, etc.

sar

#Network Connection Status View

netstat -s

#Process Resource Usage Information View

pidstat 1

pidstat -d 1

#View system call information of a process-p followed by process id, -tttT system call time after process system

strace -tttT -p 12670

#Statistics IO device input and output system call information

strace -c dd if=/dev/zero of=/dev/null bs=512 count=1024k

#tcpdump View network packets

tcpdump -nr /tmp/out.tcpdump

#Read/write event information statistics of block devices

btrace /dev/sdb

#iotop View IO operation statistics for a process

iotop -bod5

#slabtop View usage information for kernel slab memory allocator

slabtop -sc

#System parameter settings

sysctl -a

#System performance metrics statistics

perf stat gzip file1

#CPU Activity Status View

perf record -a -g -F 997 sleep 10

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