On Mon, Jun 16, 2008 at 10:34 AM, Robert Treat <[EMAIL PROTECTED]> wrote: > Given that PostgreSQL relies on the operating > system for a majority of it's instermentation (ie. we have nothing like v$ > tables in oracle), we should really be thinking of dtrace as the ultimate > tool for DBA's to figure out what is going on in thier systems.
Over a year ago, we added an Oracle wait-event-like interface (counters and timers) to the core of Advanced Server which not only provides everything DTrace currently does, but is also cross-platform and is < 300 lines of code in the core. While DTrace has a little less overhead due to its use of a user-mode high-resolution timer, neither benchmarks or customers have found our implementation to cause any performance degradation when timing is enabled. It wouldn't be too hard to write the probes in such a way as they could be used by DTrace or by a loadable timing/counter implementation for platforms which don't support DTrace. -- Jonah H. Harris, Sr. Software Architect | phone: 732.331.1324 EnterpriseDB Corporation | fax: 732.331.1301 499 Thornall Street, 2nd Floor | [EMAIL PROTECTED] Edison, NJ 08837 | http://www.enterprisedb.com/ -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
