Re: Review: DTrace probes (merged version)

Alvaro Herrera napsal(a):
> Zdenek Kotala wrote:
>> Alvaro Herrera napsal(a):
> 
>>>> proc-master-start
>>>> proc-master-stop
>>> What's "master" here?
>> Main process - postmaster.
> 
> Huh, surely we're not interested in tracking postmaster start?
> 

It depends. See following schema example


postgres::proc-master-start
{   tracking = 1
}

syscall:::open:entry
/ tracking == 1/
{   ... print file name ...
}

postgres::proc-master-stop
{  tracking = 0
}

It is very useful because it say when you can start and stop monitoring for 
example. But I'm not DTrace expert maybe there is different way how to do it.
    Zdenek


-- 
Zdenek Kotala              Sun Microsystems
Prague, Czech Republic     http://sun.com/postgresql