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如何在my.cnf文件中设置内存限制。我尝试了memory_limit = 64M。但是在重启MYSQL服务器时显示错误。任何人都可以帮助…
my.cnf
memory_limit = 64M
[mysqld] datadir=/home/mysql/ tmpdir=/home/mysqltmp #max_connections = 175 #was 175 max_connections = 80 #max_connect_errors = 350 #was 250 max_connect_errors = 250 safe-show-database skip-locking key_buffer = 1024M # was 128M max_allowed_packet = 6M myisam_sort_buffer_size = 64M #old settings, for 900 ish max maxconn #sort_buffer_size = 32M #read_buffer_size = 32M #read_rnd_buffer_size = 32M sort_buffer_size = 5M read_buffer_size = 5M read_rnd_buffer_size = 5M query_cache_size= 1024M query_cache_limit= 16M max_heap_table_size = 128M tmp_table_size = 128M thread_concurrency = 16 wait_timeout = 10 innodb_file_per_table innodb_log_file_size = 10485760 open_files_limit = 8192 low_priority_updates = 1 #log_slow_queries = /var/log/mysql_slow.log #log_queries_not_using_indexes = 1 #slow_queries_log_file = /var/log/mysql_slow.log memory_limit = 64M # who set these? these are NOT memory settings, but rather integer settings. #table_cache = 1024M #thread_cache_size = 8M table_cache = 512 thread_cache_size = 8 [mysqldump] quick max_allowed_packet = 16M [mysql] no-auto-rehash [isamchk] key_buffer = 128M sort_buffer_size = 128M read_buffer = 2M write_buffer = 2M [myisamchk] key_buffer = 128M sort_buffer_size = 128M read_buffer = 2M write_buffer = 2M
没有像memory_limit MySQL my.cnf文件中这样的变量。您只能从MySQL服务器系统变量中添加变量。阅读本文Mysql如何使用内存
memory_limit
这取决于您的MySQL服务器的RAM大小。您可以my.cnf根据以下用于MySQL内存需求计算的基本公式来相应地配置文件:
key_buffer_size + (read_buffer_size + sort_buffer_size) * max_connections = K bytes of memory
您可能需要配置这些基本参数。
来自my.cnf文件的样本变量:
#MyISAM key_buffer_size = 8G sort_buffer_size = 1M read_buffer_size = 1M read_rnd_buffer_size = 2M myisam_sort_buffer_size = 2M join_buffer_size = 2M #Innodb innodb_buffer_pool_size = 16G innodb_additional_mem_pool_size = 2G innodb_log_file_size = 1G innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_lock_wait_timeout = 30 innodb_file_format=barracuda