content_image/674185.jpg content_image/674191.jpg content_image/674192.jpg
Maximum Value (32-bit platforms) 

4294967295 

If this value is greater than 1, MyISAM  table indexes are created in parallel (each index in its own thread) during the Repair by sorting  process. The default value is 1. 

<img src='content_image/674185.jpg'>

• myisam_sort_buffer_size 

## Note 

Multithreaded repair is still beta-quality  code. 

<img src='content_image/674191.jpg'>

The size of the buffer that is allocated when sorting MyISAM  indexes during a REPAIR TABLE  or when creating indexes with CREATE INDEX  or ALTER TABLE . 

• myisam_stats_method 

<img src='content_image/674192.jpg'>

How the server treats NULL  values when collecting statistics about the distribution of index values for MyISAM  tables. This variable has three possible values, nulls_equal , nulls_unequal , and nulls_ignored . For nulls_equal , all NULL  index values are considered equal and form a single value group that has a size equal to the number of NULL  values. For nulls_unequal , NULL  values are 

