Re: BUG #4510: memory leak with libpg.dll

From: Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>
To: MWendt <marian(dot)wendt(at)inca(dot)eu>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #4510: memory leak with libpg.dll
Date: 2008-11-05 11:15:45
Message-ID: 49118061.1010401@postnewspapers.com.au
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MWendt wrote:
> The following bug has been logged online:
>
> Bug reference: 4510
> Logged by: MWendt
> Email address: marian(dot)wendt(at)inca(dot)eu
> PostgreSQL version: 8.1.x, 8.2.x
> Operating system: windows xp (client), linux (postgres server)
> Description: memory leak with libpg.dll
> Details:
>
> 1) DB server is down.
> 2) the client will connect to these DB server and is running correctly in a
> timeout. the problem is: for each connection attempt that will fail the
> memory usage is growing. that will result in massive memory allocation, if
> the client try to reconnect in high frequency. and furthermore the memory is
> not freed when the next connection can be established.
> 3) I guess in libpg.dll are some connection structures that are not freed
> correctly if the connection coult not established well.

Is there any chance you can supply the source code of a self-contained,
compileable test case (example program) that can demonstrate this? Your
description doesn't exclude the possibility of leaks occurring as a
consequence of failure to free resources in the program using libpq.

--
Craig Ringer

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