Question: I'm new to MySQL. The `GetFamilyTree(id)` function that Rolando suggested in the [Find highest level of a hierarchical field: with vs without CTEs](https://dba.stackexchange.com/questions/7147/find-highest-level-of-a-hierarchical-field-with-vs-without-ctes) question was great but when the id is greater than 999 it hangs. 

Is there a solution that works with larger ids?

Answer: 
The list of trace flags which you found on MSDN are the only flags which you should be running.

Anything which isn't documented is only supposed to be used by the developers and PSS when troubleshooting problems.
Even though this is a pretty old thread, Microsoft has officially published the list of Trace Flags that can be used when running SQL Server 2012 and up for high performance workloads :

[`**KB - 2964518**`](https://support.microsoft.com/en-us/kb/2964518) - Recommended updates and configuration options for SQL Server 2012 and SQL Server 2014 with high-performance workloads.

Its highly advisable to do a thorough testing when enabling trace flags to [avoid any surprises](http://www.sqlcoffee.com/Tips0023.htm).