Daily Notes-20200817

1. Check the database code

select userenv('language') from dual;

2. View the system cpu usage log

ps aux|head -1;ps aux|grep -v PID|sort -rn -k +3|head
top -H -p  $PID
strace -p $PID    # 线程所有调用

• Field analysis
  PID : process ID USER : process owner PR : priority level of the process, the smaller the priority is to be executed
  VIRT : virtual memory occupied by the process RES : physical memory occupied by the process SHR : shared memory used by the process
  S : process’s status. S means dormant, R means running, Z means dead state, N means that the priority value of the process is negative
  %CPU : the usage rate of the CPU occupied by the process %MEM : the percentage of physical memory and total memory used by the process
  TIME+ : after the process is started The total CPU time occupied, that is, the cumulative value of the occupied CPU time.
  COMMAND : Process start command name

ps -eo pid,ppid,%mem,%cpu,cmd --sort=-%cpu | head

View system log

sar -u -f /var/log/sa/saxx

4. Set the vim encoding format
vim ~/.vimrc
set encoding=utf-8 to
refresh and import to take effect
. ~/.vimrc