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Bug #32149 Long semaphore wait for adaptive hash latch

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Fix by calling ha_release_temporary_latches() before ::filesort().


sql/filesort.cc:
  Call ha_release_temporary_latches() before performing
  a (possibly long) ::filesort().
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unknown 2008-01-30 19:00:20 -07:00
parent 359b2cedb4
commit a3f80f54b4
1 changed files with 7 additions and 0 deletions
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7
sql/filesort.cc
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@ -112,6 +112,13 @@ ha_rows filesort(THD *thd, TABLE *table, SORT_FIELD *sortorder, uint s_length,
FILESORT_INFO table_sort; FILESORT_INFO table_sort;
TABLE_LIST *tab= table->pos_in_table_list; TABLE_LIST *tab= table->pos_in_table_list;
Item_subselect *subselect= tab ? tab->containing_subselect() : 0; Item_subselect *subselect= tab ? tab->containing_subselect() : 0;
/*
Release InnoDB's adaptive hash index latch (if holding) before
running a sort.
*/
ha_release_temporary_latches(thd);
/* /*
Don't use table->sort in filesort as it is also used by Don't use table->sort in filesort as it is also used by
QUICK_INDEX_MERGE_SELECT. Work with a copy and put it back at the end QUICK_INDEX_MERGE_SELECT. Work with a copy and put it back at the end