MySQL自用脚本（不定期更新）

Posted 2020-08-03 polestar

查询指定SQL的trace信息

mysql -uUSER -pPWD -hHOST -e "\
use ins_tc_prd; set session optimizer_trace=‘enabled=on‘; set optimizer_trace_max_mem_size = 1638400; explain SQL; select * from information_schema.optimizer_trace\G;" > trace_log.log

 查看表空间的使用情况

select table_name, 
       (data_length+ index_length) /1024/1024 as total_mb, 
       table_rows 
from information_schema.tables 
where table_schema= ‘Database‘ ;//不写就是全部

 查看MySQL数据库状态

mysqladmin -P3306 -uroot -p -h127.0.0.1 -r -i 1 extended-status |awk -F"|" "BEGIN{ count=0; }"‘{ if($2 ~ /Variable_name/ && ((++count)%20 == 1)){\ 
print "----------|---------|--- MySQL Command Status --|----- Innodb row operation -----|-- Buffer Pool Read --";\ 
print "---Time---|---QPS---|select insert update delete|  read  inserted updated deleted|   logical    physical";\ 
}\ 
else if ($2 ~ /Queries/){queries=$3;}\ 
else if ($2 ~ /Com_select /){com_select=$3;}\ 
else if ($2 ~ /Com_insert /){com_insert=$3;}\ 
else if ($2 ~ /Com_update /){com_update=$3;}\ 
else if ($2 ~ /Com_delete /){com_delete=$3;}\ 
else if ($2 ~ /Innodb_rows_read/){innodb_rows_read=$3;}\ 
else if ($2 ~ /Innodb_rows_deleted/){innodb_rows_deleted=$3;}\ 
else if ($2 ~ /Innodb_rows_inserted/){innodb_rows_inserted=$3;}\ 
else if ($2 ~ /Innodb_rows_updated/){innodb_rows_updated=$3;}\ 
else if ($2 ~ /Innodb_buffer_pool_read_requests/){innodb_lor=$3;}\ 
else if ($2 ~ /Innodb_buffer_pool_reads/){innodb_phr=$3;}\ 
else if ($2 ~ /Uptime / && count >= 2){\ 
printf(" %s |%9d",strftime("%H:%M:%S"),queries);\ 
printf("|%6d %6d %6d %6d",com_select,com_insert,com_update,com_delete);\ 
printf("|%8d %6d %7d %7d",innodb_rows_read,innodb_rows_inserted,innodb_rows_updated,innodb_rows_deleted);\ 
printf("|%10d %11d\n",innodb_lor,innodb_phr);\ 
}}‘;

 

 

 

转自

1. http://blog.itpub.net/29510932/viewspace-1812475/