Zdenek Kotala wrote:
> Attached patch contains new dtrace probes for memory management. Main
> purpose is to analyze memory footprint - for example how many memory
> needs transaction, peak memory per context, when memory block is reused
> or when it is allocate by malloc and so on.
Having had to instrument these to figure out some problems, I'd give
this patch a +1. However, the performance argument is compelling. As a
compromise, maybe we could have a #define that needs to be turned on at
compile time to enable these probes; so a regular dtrace-enabled build
would not have them, but if you really needed to analyze memory
allocations, you could recompile to turn them on.
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
