MySQL Variables bulk_insert_buffer_size 数据库 参数变量解释及正确配置使用
本站中文解释
bulk_insert_buffer_size变量用于指定MySQL每次插入大量数据时,MySQL内部缓存内存空间的大小。当MySQL用于插入大量的内容时,设置较大的bulk_insert_buffer_size可以在保证性能的基础上提升批量插入的速度,因为MySQL可以一次性将数据放入缓冲中而不必每条记录都单独提交到磁盘上。
要设置bulk_insert_buffer_size,可以在MySQL的参数缓存中直接设置其值:
mysql> SET GLOBAL bulk_insert_buffer_size = 8388608;
官方英文解释
bulk_insert_buffer_size
Command-Line Format | --bulk-insert-buffer-size=# |
---|---|
System Variable | bulk_insert_buffer_size |
Scope | Global, Session |
Dynamic | Yes |
Type | Integer |
Default Value | 8388608 |
Minimum Value | 0 |
Maximum Value (64-bit platforms) | 18446744073709551615 |
Maximum Value (32-bit platforms) | 4294967295 |
Unit | bytes/thread |
MyISAM
uses a special tree-like cache to
make bulk inserts faster for
INSERT ...
,
SELECTINSERT ... VALUES (...), (...),
, and
...LOAD DATA
when adding data to nonempty tables. This variable limits the
size of the cache tree in bytes per thread. Setting it to 0
disables this optimization. The default value is 8MB.