Flag Description
200 Displays messages about the before image of the query-tree.
201 Displays messages about the after image of the query-tree.
241 Compress all query-trees whenever the SQL dataserver is started.
260 Reduce TDS (Tabular Data Stream) overhead in stored procedures. Turn off done-in-proc packets. Do not use this if your application is a ct-lib based application; it'll break.
Why set this on? Glad you asked, typically with a db-lib application a packet is sent back to the clIEnt for each batch executed within a stored procedure. This can be taxing in a WAN/LAN environment.
299 This trace flag instructs the dataserver to not recompile a child stored procedure that inherits a temp table from a parent procedure.
302 Print information about the optimizer's index selection.
303 Display OR strategy
304 Revert special or optimizer strategy to that strategy used in pre-System 11 (this traceflag resolved several bug issues in System 11, most of these bugs are fixed in SQL Server 11.0.3.2)
310 Print information about the optimizer's join selection.
311 Display the expected IO to satisfy a query. Like statistics IO without actually executing.
317 Provide extra optimization information.
319 Reformatting strategIEs.
320 Turn off the join order heuristic.
324 Turn off the like optimization for ad-hoc querIEs using @local_variables.
602 Prints out diagnostic information for deadlock prevention.
603 Prints out diagnostic information when avoiding deadlock.
699 Turn off transaction logging for the entire SQL dataserver.
1204* Send deadlock detection to the errorlog.
1205 Stack trace on deadlock.
1206 Disable lock promotion.
1603* Use standard disk I/O (i.e. turn off asynchronous I/O).
1605 Start secondary engines by hand
1606 Create a debug engine start file. This allows you to start up a debug engine which can Access the server's shared memory for running diagnostics. I'm not sure how useful this is in a production environment as the debugger often brings down the server. I'm not sure if Sybase ha
