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| author | Sergei Golubchik <sergii@pisem.net> | 2012-11-03 12:28:51 +0100 |
|---|---|---|
| committer | Sergei Golubchik <sergii@pisem.net> | 2012-11-03 12:28:51 +0100 |
| commit | 40e94a3734b1daa254810c4be64e17b84dbbc2a2 (patch) | |
| tree | 5e14dfc106276445caf85dc76c8034c8b0df11b4 /sql/mdl.h | |
| parent | 247e654fa7e04dd0c5181c2241470f56749d2a99 (diff) | |
| parent | 4ffc9c3b01459a2904a7154a6c750d128864fc7b (diff) | |
| download | mariadb-git-40e94a3734b1daa254810c4be64e17b84dbbc2a2.tar.gz | |
merge with 5.5
Diffstat (limited to 'sql/mdl.h')
| -rw-r--r-- | sql/mdl.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sql/mdl.h b/sql/mdl.h index f816d160f7b..477f4df7807 100644 --- a/sql/mdl.h +++ b/sql/mdl.h @@ -876,4 +876,10 @@ extern mysql_mutex_t LOCK_open; extern ulong mdl_locks_cache_size; static const ulong MDL_LOCKS_CACHE_SIZE_DEFAULT = 1024; +/* + Metadata locking subsystem tries not to grant more than + max_write_lock_count high-prio, strong locks successively, + to avoid starving out weak, low-prio locks. +*/ +extern "C" ulong max_write_lock_count; #endif |