"Martijn van Oosterhout" <kleptog@svana.org> writes: > BTW, doing gettimeofday() without kernel entry is not really possible.
That's too strong a conclusion. Doing gettimeofday() without some help from the kernel isn't possible but it isn't necessary to enter the kernel for each call. There are various attempts at providing better timing infrastructure at low overhead but I'm not sure what's out there currently. I expect to do this what we'll have to do is invent a pg_* abstraction that has various implementations on different architectures. On Solaris it can use DTrace internally, on Linux it might have something else (or more likely several different options depending on the age and config options of the kernel). -- Gregory Stark EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 7: You can help support the PostgreSQL project by donating at http://www.postgresql.org/about/donate
