On Thu, Mar 17, 2016 at 9:22 PM, Michael Paquier
<michael.paqu...@gmail.com> wrote:
> FWIW, my instinctive thought on the matter is to report the event
> directly in WaitLatch() via a name of the event caller provided
> directly in it. The category of the event is then defined
> automatically as we would know its origin. The code path defining the
> origin point from where a event type comes from is the critical thing
> I think to define an event category. The LWLock events are doing that
> in lwlock.c.

I'm very skeptical of grouping everything that waits using latches as
a latch wait, but maybe it's OK to do it that way.  I was thinking
more of adding categories like "client wait" with events like "client
read" and "client write".

Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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