Re: [GENERAL] Memory Errors... - Mailing list pgsql-hackers

From Joe Conway
Subject Re: [GENERAL] Memory Errors...
Date
Msg-id 3D8A0C40.9060700@joeconway.com
Whole thread Raw
In response to Re: [GENERAL] Memory Errors...  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: [GENERAL] Memory Errors...
List pgsql-hackers
Tom Lane wrote:
> I said:
> 
>>Yeah, I see very quick memory exhaustion also :-(.  Looks like the
>>spi_exec call is the culprit, but I'm not sure exactly why ...
>>anyone have time to look at this?
> 
> 
> On looking a little more closely, it's clear that pltcl_SPI_exec()
> should be, and is not, calling SPI_freetuptable() once it's done with
> the tuple table returned by SPI_exec().  This needs to be done in all
> the non-elog code paths after SPI_exec has returned SPI_OK_SELECT.
> pltcl_SPI_execp() has a similar problem, and there may be comparable
> bugs in other pltcl routines (not to mention other sources of memory
> leaks, but I think this is the problem for your example).
> 
> I have no time to work on this right now; any volunteers out there?
> 

I can give it a shot, but probably not until the weekend.

I haven't really followed this thread closely, and don't know tcl very well, 
so it would help if someone can send me a minimal tcl function which triggers 
the problem.

Thanks,

Joe



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