On Wed, 2008-02-06 at 15:30 +0100, Staale Smedseng wrote: > On Mon, 2008-02-04 at 19:46, Simon Riggs wrote: > > We've got various facilities now for looking at LWLock waits, but I'd > > like to have more information about the *reasons* for lock waits. > > > > I know its possible to get backtraces in Dtrace at various tracepoints > > but that can be fairly hard to interpret.
Thanks for this Staale. > Lock Id Mode Count > ProcArrayLock Shared 1821 > ProcArrayLock Exclusive 49762 > > Lock Id Mode Combined Time (ns) > ProcArrayLock Shared 31114676303 > ProcArrayLock Exclusive 888356047549 Which looks like a mean service time of 17ms for X lock waiters. What is the frequency distribution of lock wait time on ProcArrayLock? Does the distribution vary over time? -- Simon Riggs 2ndQuadrant http://www.2ndQuadrant.com ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org
