Jan Lindström 13884cf206 MDEV-8696: Adding indexes on empty table is slow with large innodb_sort_buffer_size. ...

Analysis: Current implementation will write and read at least one block
(sort_buffer_size bytes) from disk / index even if that block does not
contain any records.

Fix: Avoid writing / reading empty blocks to temporary files (disk).

2015-10-27 13:00:15 +02:00

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