diff options
Diffstat (limited to 'sql/mdl.cc')
| -rw-r--r-- | sql/mdl.cc | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sql/mdl.cc b/sql/mdl.cc index 22d9d4e53e5..dd7d3f0fbf4 100644 --- a/sql/mdl.cc +++ b/sql/mdl.cc @@ -1872,6 +1872,8 @@ MDL_context::find_ticket(MDL_request *mdl_request, if (mdl_request->key.is_equal(&ticket->m_lock->key) && ticket->has_stronger_or_equal_type(mdl_request->type)) { + DBUG_PRINT("info", ("Adding mdl lock %d to %d", + mdl_request->type, ticket->m_type)); *result_duration= duration; return ticket; } @@ -2168,6 +2170,7 @@ MDL_context::acquire_lock(MDL_request *mdl_request, ulong lock_wait_timeout) struct timespec abs_timeout; MDL_wait::enum_wait_status wait_status; DBUG_ENTER("MDL_context::acquire_lock"); + DBUG_PRINT("enter", ("lock_type: %d", mdl_request->type)); /* Do some work outside the critical section. */ set_timespec(abs_timeout, lock_wait_timeout); @@ -2182,6 +2185,7 @@ MDL_context::acquire_lock(MDL_request *mdl_request, ulong lock_wait_timeout) MDL_lock, MDL_context and MDL_request were updated accordingly, so we can simply return success. */ + DBUG_PRINT("info", ("Got lock without waiting")); DBUG_RETURN(FALSE); } @@ -2393,8 +2397,9 @@ MDL_context::upgrade_shared_lock(MDL_ticket *mdl_ticket, MDL_request mdl_xlock_request; MDL_savepoint mdl_svp= mdl_savepoint(); bool is_new_ticket; - DBUG_ENTER("MDL_context::upgrade_shared_lock"); + DBUG_PRINT("enter",("new_type: %d lock_wait_timeout: %lu", new_type, + lock_wait_timeout)); DEBUG_SYNC(get_thd(), "mdl_upgrade_lock"); /* @@ -2701,8 +2706,8 @@ void MDL_context::release_lock(enum_mdl_duration duration, MDL_ticket *ticket) { MDL_lock *lock= ticket->m_lock; DBUG_ENTER("MDL_context::release_lock"); - DBUG_PRINT("enter", ("db=%s name=%s", lock->key.db_name(), - lock->key.name())); + DBUG_PRINT("enter", ("db: '%s' name: '%s'", + lock->key.db_name(), lock->key.name())); DBUG_ASSERT(this == ticket->get_ctx()); mysql_mutex_assert_not_owner(&LOCK_open); |