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myisam_bulk_insert_tree_size clarification

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serg@serg.mysql.com 2001-12-04 16:52:28 +01:00
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commit f481272998
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Docs/manual.texi
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@ -18413,7 +18413,9 @@ After this many write locks, allow some read locks to run in between.
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 per thread. Default value is 8 MB.
the size of the cache tree in bytes per thread.
@strong{Note:} This cache is only used when adding data to non-empty table.
Default value is 8 MB.
@item @code{myisam_recover_options}
The value of the @code{--myisam-recover} option.
@ -24116,10 +24118,10 @@ Some ways to speed up inserts:
@itemize @bullet
@item
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
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}.
multiple value lists @code{INSERT} statements. This is much faster (many times
in some cases) than using separate @code{INSERT} statements. If you are adding
data to non-empty table, you may tune up @code{myisam_bulk_insert_tree_size}
variable to make it even faster. @xref{SHOW VARIABLES}.
@item
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,