Re: Memory growth observed with C++ application consuming libpq.dll on Windows

From: Yasir <yasir(dot)hussain(dot)shah(at)gmail(dot)com>
To: Rajesh Kokkonda <rajeshk(dot)kokkonda(at)gmail(dot)com>
Cc: pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Memory growth observed with C++ application consuming libpq.dll on Windows
Date: 2024-08-01 11:57:04
Message-ID: CAA9OW9fo38Fi31vPN8YDxo43kwpaUjupB+mV-tA+Mtf9nNf0hA@mail.gmail.com
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Hi Rajesh,

Can you please attach a sample code snippet showing libpq's functions being
called? It will help to identify the libpq's functions to investigate
further for a potential mem leak.

Regards...

Yasir Hussain

On Thu, Aug 1, 2024 at 4:30 PM Rajesh Kokkonda <rajeshk(dot)kokkonda(at)gmail(dot)com>
wrote:

> Hi,
>
> We are seeing a gradual growth in the memory consumption of our process on
> Windows. Ours is a C++ application that directly loads libpq.dll and
> handles the queries and functions. We use setSingleRowMethod to limit the
> number of rows returned simultaneously to the application. We do not
> observe any memory increase when the application is run on Linux. There is
> no code difference between Windows and Linux from the
> application standpoint. We ran valgrind against our application on Linux
> and found no memory leaks. Since the same code is being used on Windows as
> well, we do not suspect any memory leak there. The question is if there
> are any known memory leaks with the version of the library we are using on
> Windows. Kindly let us know.
>
> The version of the library on Linux is libpq.so.5.16
>
> The windows version of the library is 16.0.3.0
>
>
> [image: image.png]
>
> Thanks,
> Rajesh
>

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