max_heap_table_size是 MySQL 中的一个系统变量,它定义了使用 MEMORY 存储引擎的临时表可以使用的最大内存。MEMORY 表的大小限制在max_heap_table_size和tmp_table_size之间,这意味着一个 MEMORY 表的最大大小不能超过max_heap_table_size,否则就会出现错误。 默认情况下,max_heap_table_size的值为 16MB。随着...
#最大连接数 max_connections=10000 max_connect_errors=10000 max_heap_table_size=256M sort_buffer_size = 32M join_buffer_size = 256M query_cache_size = 64M query_cache_limit = 4M query_cache_min_res_unit = 32k #open_files_limit = 10240 #back_log = 1000 #编码 character-set-server=ut...
max_heap_table_size = 2G tmp_table_size = 2G max_tmp_tables = 128 table_open_cache = 512 sort_buffer_size = 8M read_buffer_size = 8M read_rnd_buffer_size = 8M thread_cache_size = 8 query_cache_size = 32M thread_concurrency = 8 back_log = 200 max_connections = 5000 max_connec...
max_heap_table_size if the table had been bigger.How to repeat:The following excerpt from sum_distinct-big test can be used to reproduce the issue: CREATE TABLE t1 (id INTEGER); CREATE TABLE t2 (id INTEGER); INSERT INTO t1 (id) VALUES (1), (1), (1),(1); INSERT INTO t1 (id...
max_heap_table_size=96M ###***slowqueryparameters long_query_time=0.1slow_query_log=1slow_query_log_file= /usr/local/mysql/logs/slow.log ###***binlogparameters log-bin=mysql-bin binlog_cache_size=4M max_binlog_cache_size=8M
mp_table_size和max_heap_table_size设置不要过大,另外sort_buffer_size、join_buffer_size、read_buffer_size、read_rnd_buffer_size等设置也不要过大。 三 MYSQL常见的应用架构分享 1、主从复制解决方案 这是MySQL自身提供的一种高可用解决方案,数据同步方法采用的是MySQL replication技术。MySQL replication就是从...
也可參见ORD()函数。 ORD(str) 假设字符串str最左面字符是一个多字节字符,通过以格式((firstbyteASCII code)*256+(secondbyteASCII code))[*256+thirdbyteASCII code...]返回字符的ASCII代码值来返回多字节字符代码。假设最左面的字符不是一个多字节字符。返回与ASCII()函数返回的同样值。
I'm pretty sure that what you are seeing is that the command line client is picking up options from your config file and setting max_heap_table_size for you. When you try to set it from the connector, you might not be setting the current session value. Most system variables come in...
size = 128M net_buffer_length = 20000 lower_case_table_names = 1 thread_cache_size = 200 ndb_batch_size = 15728640 ndb_use_transactions = 0 # Add new parameter ### table_open_cache=2048 default-storage-engine=NDBCLUSTER # Buffers ## join_buffer_size=512K sort_buffer_size=512K read...
Re: "Table is full" with connector 5.0.5. Does it ignore max_heap_table_size?Posted by: Reggie Burnett Date: August 09, 2007 06:03AM Sergey It may not set properly using the connector because the connector doesn't create an interactive session. THere is a flag that mysqld takes ...