Split IO threads into ones that handle only read completion and ones that handle only write completion, as it was originally done, but got lost with "completion port" patch. The reason we need to have dedicated read and dedicated write threads is that read completion routine can block waiting for write io to complete, and in rare cases where all io threads are handling async reads, it can deadlock.
sql/sql_insert.cc:
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
******
CREATE ... IF NOT EXISTS may do nothing, but
it is still not a failure. don't forget to my_ok it.
sql/sql_table.cc:
small cleanup
******
small cleanup
The reason for the long shutdown is hanging in io threads. It appears
that just closing completion port on XP does not necessarily signal
thread waiting in GetIOCompletionStatus() (even if this works fine
on later Windows versions)
The fix is to wakeup background threads using PostQueuedCompletionStatus()
with a special 'key' parameter indicating shutdown.
The reason for the crash is Innodb assertion after trying to load condition variables function
dynamically and not finding them
The fix is to skip dynamic loading if srv_use_native_conditions is FALSE. srv_use_native_conditions
is derived from Windows version and would be FALSE on XP and TRUE on later Windows.
This is the same handling as in MySQL 5.. In Maria 5.3 srv_use_native_conditions check was
presumably lost in the downporting.
map them to corresponding Windows CreateFile flags,
O_DSYNC=>FILE_FLAG_WRITE_THROUGH
ALL_O_DIRECT=>FILE_FLAG_NO_BUFFERING
Ability to specify innodb_flush_method=O_DSYNC fixes MySQL Bug#31876
(InnoDB commit performance slow on Windows XP), by removing an extra FlushFileBuffers()
call overhead.
Windows native async io is disabled.
The patch uses completion ports for asynchronous IO notification ,
instead of formerly used notification via event . This also removes
the limit of 64 async IOs per background IO thread (this limit was
forced by using WaitForMultipleObjects in previous AIO implementation)
Fixed compiler warnings in xtradb
Added back resetting of null bitmap but now in row_search_for_mysql()
storage/xtradb/row/row0sel.c:
Added back resetting of null bitmap but now in row_search_for_mysql()
Implement os_event_wait_time() for POSIX systems.
In the purge thread, use os_event_wait_time() when sleeping rather than sleep,
and signal the event when server shuts down, so we do not need to wait for
upto 10 seconds until the purge thread wakes up.
Also fix bug that warnings that were pushed after we call set_ok_status() were
not included in the waning count sent to the client in the result packet.
Also in mysqltest, in recursive die() invocation at least print the message
before aborting.
client/mysqltest.cc:
If we detect recursive die(), at least print the message before aborting.
mysql-test/r/warnings_debug.result:
Test case.
mysql-test/t/warnings_debug.test:
Test case.
sql/handler.cc:
Force generation of a warning with specific debug option, for testing.
sql/protocol.cc:
Fix wrong DBUG_ENTER
sql/sql_class.h:
Add method to count warnings pushed after set_ok_status() is called.
sql/sql_error.cc:
Also count warnings pushed after set_ok_status() is called.
storage/xtradb/include/os0sync.h:
Implement working os_sync_wait_time() for POSIX.
storage/xtradb/include/srv0srv.h:
Make the purge thread wait for an event when sleeping, so we can signal it to
wakeup immediately at shutdown.
storage/xtradb/log/log0log.c:
Make the purge thread wait for an event when sleeping, so we can signal it to
wakeup immediately at shutdown.
storage/xtradb/os/os0sync.c:
Implement working os_sync_wait_time() for POSIX.
storage/xtradb/srv/srv0srv.c:
Make the purge thread wait for an event when sleeping, so we can signal it to
wakeup immediately at shutdown.
