Re: [pcp] URGENT potentially serious regression in 3.7.0

[Nathan Scott <nathans@xxxxxxxxxx>]

Ah, looks like the crazy level of diagnostics is coming from here
in pmcd...

671     #ifdef PCP_DEBUG
672                 if (pmDebug & DBG_TRACE_APPL0)
673                     for (i = 0; i <= maxClientFd; i++)
674                         if (__pmFD_ISSET(i, &readableFds))
675                             fprintf(stderr, "DATA: from %s (fd %d)\n", 
FdToString(i), i);
676     #endif

The NSS variant of __pmFD_ISSET looks up the NSS socket, and that
involves a call to __pmDataIPC, which has this diagnostic on each
entry:

if (pmDebug & DBG_TRACE_CONTEXT)
        fprintf(stderr, "__pmDataIPC: fd=%d\n", fd);

so, ends up being alot & pmcd will slow down cos its issuing so
many log messages.  

cheers.

--
Nathan