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Bug#17332 - changing key_buffer_size on a running server

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can crash under load

Backport from 5.1.
Does also include key cache fixes from:
Bug 44068 (RESTORE can disable the MyISAM Key Cache)
Bug 40944 (Backup: crash after myisampack)
This commit is contained in:
Ingo Struewing
2009-09-07 18:35:37 +02:00
parent e1d49b8143
commit 1b60803282
6 changed files with 2210 additions and 508 deletions
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7
sql/sql_table.cc
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@ -2741,8 +2741,13 @@ int reassign_keycache_tables(THD *thd, KEY_CACHE *src_cache,
bool mysql_preload_keys(THD* thd, TABLE_LIST* tables)
{
DBUG_ENTER("mysql_preload_keys");
/*
We cannot allow concurrent inserts. The storage engine reads
directly from the index file, bypassing the cache. It could read
outdated information if parallel inserts into cache blocks happen.
*/
DBUG_RETURN(mysql_admin_table(thd, tables, 0,
"preload_keys", TL_READ, 0, 0, 0, 0,
"preload_keys", TL_READ_NO_INSERT, 0, 0, 0, 0,
&handler::preload_keys, 0));
}