【MySQL】とりうるメモリのサイズ

MySQLが取りうるメモリのサイズ

SELECT ROUND(
    ( @@GLOBAL.key_buffer_size                     
     + @@GLOBAL.query_cache_size 
     + @@GLOBAL.tmp_table_size 
     + @@GLOBAL.innodb_buffer_pool_size 
     + @@GLOBAL.innodb_log_buffer_size 
     + @@GLOBAL.max_connections * ( 
         @@GLOBAL.sort_buffer_size
       + @@GLOBAL.read_buffer_size 
       + @@GLOBAL.read_rnd_buffer_size 
       + @@GLOBAL.join_buffer_size 
       + @@GLOBAL.thread_stack 
       + @@GLOBAL.binlog_cache_size
       + @@GLOBAL.net_buffer_length
       + @@GLOBAL.query_prealloc_size
       + @@GLOBAL.preload_buffer_size)
    ) / 1024 / 1024, 1) `total MB`;

SHOW ENGINE PERFORMANCE_SCHEMA STATUS;