Each option is described below. Values for buffer sizes, lengths, and stack
Each option is described below. Values for buffer sizes, lengths, and stack
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@@ -22262,6 +22261,14 @@ The buffer that is allocated when sorting the index when doing a
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@@ -22262,6 +22261,14 @@ The buffer that is allocated when sorting the index when doing a
@code{REPAIR} or when creating indexes with @code{CREATE INDEX} or
@code{REPAIR} or when creating indexes with @code{CREATE INDEX} or
@code{ALTER TABLE}.
@code{ALTER TABLE}.
@item @code{myisam_bulk_insert_tree_size}
@strong{MySQL} uses special tree-like cache to make bulk inserts (that is,
@code{INSERT ... SELECT},
@code{INSERT ... VALUES (...), (...), ...}, and
@code{LOAD DATA INFILE}) faster. This variable limits
the size of the cache tree in bytes @strong{per thread, per index}.
Default value is 8 MB.
@item @code{myisam_max_extra_sort_file_size}.
@item @code{myisam_max_extra_sort_file_size}.
If the creating of the temporary file for fast index creation would be
If the creating of the temporary file for fast index creation would be
this much bigger than using the key cache, then prefer the key cache
this much bigger than using the key cache, then prefer the key cache
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@@ -23948,8 +23955,8 @@ The following options to @code{mysqld} can be used to change the behavior of
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@@ -23948,8 +23955,8 @@ The following options to @code{mysqld} can be used to change the behavior of
@item @code{-O myisam_sort_buffer_size=#} @tab Buffer used when recovering tables.
@item @code{-O myisam_sort_buffer_size=#} @tab Buffer used when recovering tables.
@item @code{--delay-key-write-for-all-tables} @tab Don't flush key buffers between writes for any MyISAM table
@item @code{--delay-key-write-for-all-tables} @tab Don't flush key buffers between writes for any MyISAM table
@item @code{-O myisam_max_extra_sort_file_size=#} @tab Used to help @strong{MySQL} to decide when to use the slow but safe key cache index create method. @strong{NOTE} that this parameter is given in megabytes!
@item @code{-O myisam_max_extra_sort_file_size=#} @tab Used to help @strong{MySQL} to decide when to use the slow but safe key cache index create method. @strong{NOTE} that this parameter is given in megabytes!
@item @code{-O myisam_max_sort_file_size=#} @tab Don't use the fast sort index method to created index if the temporary file would get bigger than this.
@item @code{-O myisam_max_sort_file_size=#} @tab Don't use the fast sort index method to created index if the temporary file would get bigger than this. @strong{NOTE} that this paramter is given in megabytes!
@strong{NOTE} that this paramter is given in megabytes!
@item @code{-O myisam_bulk_insert_tree_size=#} @tab Size of tree cache used in bulk insert optimization. @strong{NOTE} that this is a limit @strong{per index}!
@end multitable
@end multitable
The automatic recovery is activated if you start @code{mysqld} with
The automatic recovery is activated if you start @code{mysqld} with
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@@ -32573,6 +32580,8 @@ Some ways to speed up inserts:
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@@ -32573,6 +32580,8 @@ Some ways to speed up inserts:
If you are inserting many rows from the same client at the same time, use
If you are inserting many rows from the same client at the same time, use
multiple value lists @code{INSERT} statements. This is much faster (many
multiple value lists @code{INSERT} statements. This is much faster (many
times in some cases) than using separate @code{INSERT} statements.
times in some cases) than using separate @code{INSERT} statements.
Tune up @code{myisam_bulk_insert_tree_size} variable to make it even
faster. @xref{SHOW VARIABLES}.
@item
@item
If you are inserting a lot of rows from different clients, you can get
If you are inserting a lot of rows from different clients, you can get
higher speed by using the @code{INSERT DELAYED} statement. @xref{INSERT,
higher speed by using the @code{INSERT DELAYED} statement. @xref{INSERT,
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@@ -46427,6 +46436,9 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
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@@ -46427,6 +46436,9 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
@itemize @bullet
@itemize @bullet
@item
@item
Tree-like cache to speed up bulk inserts and
@code{myisam_bulk_insert_tree_size} variable.
@item
Added @code{ALTER TABLE table_name DISABLE KEYS} and
Added @code{ALTER TABLE table_name DISABLE KEYS} and
