Increased memory usage with GHC 7.10.1

[Jan Stolarek]

An update frrom my second machine, this time with 4GB of RAM. Compiling Agda ran out of memory 
(again Agda.TypeChecking.Serialise module) and I had to kill the build. But once I restarted the 
build the module was compiled succesfully in a matter of minutes and using around 50% of memory. 
This looks like some kind of memory leak in GHC.

Janek

Dnia środa, 1 kwietnia 2015, Jan Stolarek napisał:
> Forall hi,
>
> I just uprgaded both of my machines to use GHC 7.10.1. I keep sandboxed
> installations of GHC and this means I had to rebuild Agda and Idris because
> the binaries built with GHC 7.8.4 were stored inside deactivated 7.8.4
> sandbox. Sadly, I had problems building both Agda and Idris due to GHC
> taking up all of available memory.
>
> With Idris the problematic module was Idris.ElabTerm (~2900LOC). The
> interesting part of the story is that when I do a clean build of Idris GHC
> consumes all of memory when compiling that module and I have to kill the
> build. But when I restart the build after killing GHC the module is
> compiled using a reasonable amount of memory and within reasonable time.
>
> With Agda the problematic module is Agda.TypeChecking.Serialise (~2000LOC).
> The trick with killing the build and restarting it didn't work in this
> case. I had to compile Agda with GHC 7.8.4 (which works without problems
> though the mentioned module still requires a lot of memory) and alter my
> setup so that Agda binary is not stored inside GHC sandbox.
>
> I wonder if any of you came across similar issues with GHC 7.10.1? Do we
> have any performance data that allows to compare memory usage and
> performance of GHC 7.10.1 with previous stable releases?
>
> All of the above happened on 64bit Debian Wheezy with 2GB of RAM.
>
> Janek
>
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---
Politechnika Łódzka
Lodz University of Technology

Treść tej wiadomości zawiera informacje przeznaczone tylko dla adresata.
Jeżeli nie jesteście Państwo jej adresatem, bądź otrzymaliście ją przez pomyłkę
prosimy o powiadomienie o tym nadawcy oraz trwałe jej usunięcie.

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