mysql内存查阅

转自：https://blog.csdn.net/weixin_36114835/article/details/113210288

效果如下

#!/bin/sh

# you might want to add some user authentication here

mysql -e "show variables; show status" | awk '

{undefined

VAR[$1]=$2

}

END {undefined

MAX_CONN = VAR["max_connections"]

MAX_USED_CONN = VAR["Max_used_connections"]

BASE_MEM=VAR["key_buffer_size"] + VAR["query_cache_size"] + VAR["innodb_buffer_pool_size"] + VAR["innodb_additional_mem_pool_size"] + VAR["innodb_log_buffer_size"]

MEM_PER_CONN=VAR["read_buffer_size"] + VAR["read_rnd_buffer_size"] + VAR["sort_buffer_size"] + VAR["join_buffer_size"] + VAR["binlog_cache_size"] + VAR["thread_stack"] + VAR["tmp_table_size"]

MEM_TOTAL_MIN=BASE_MEM + MEM_PER_CONN*MAX_USED_CONN

MEM_TOTAL_MAX=BASE_MEM + MEM_PER_CONN*MAX_CONN

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %15.3f MB |\n", "key_buffer_size", VAR["key_buffer_size"]/1048576

printf "| %40s | %15.3f MB |\n", "query_cache_size", VAR["query_cache_size"]/1048576

printf "| %40s | %15.3f MB |\n", "innodb_buffer_pool_size", VAR["innodb_buffer_pool_size"]/1048576

printf "| %40s | %15.3f MB |\n", "innodb_additional_mem_pool_size", VAR["innodb_additional_mem_pool_size"]/1048576

printf "| %40s | %15.3f MB |\n", "innodb_log_buffer_size", VAR["innodb_log_buffer_size"]/1048576

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %15.3f MB |\n", "BASE MEMORY", BASE_MEM/1048576

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %15.3f MB |\n", "sort_buffer_size", VAR["sort_buffer_size"]/1048576

printf "| %40s | %15.3f MB |\n", "read_buffer_size", VAR["read_buffer_size"]/1048576

printf "| %40s | %15.3f MB |\n", "read_rnd_buffer_size", VAR["read_rnd_buffer_size"]/1048576

printf "| %40s | %15.3f MB |\n", "join_buffer_size", VAR["join_buffer_size"]/1048576

printf "| %40s | %15.3f MB |\n", "thread_stack", VAR["thread_stack"]/1048576

printf "| %40s | %15.3f MB |\n", "binlog_cache_size", VAR["binlog_cache_size"]/1048576

printf "| %40s | %15.3f MB |\n", "tmp_table_size", VAR["tmp_table_size"]/1048576

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %15.3f MB |\n", "MEMORY PER CONNECTION", MEM_PER_CONN/1048576

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %18d |\n", "Max_used_connections", MAX_USED_CONN

printf "| %40s | %18d |\n", "max_connections", MAX_CONN

printf "+------------------------------------------+--------------------+\n"

printf "| %40s | %15.3f MB |\n", "TOTAL (MIN)", MEM_TOTAL_MIN/1048576

printf "| %40s | %15.3f MB |\n", "TOTAL (MAX)", MEM_TOTAL_MAX/1048576

printf "+------------------------------------------+--------------------+\n"

}'