[gnugo-devel] Re: a minor configure oddity: default_cache_size

[bump]

Aquarius wrote:

>'./configure --help' says the RAM-cache default is 16M but GNU Go still gets
> built with 8M by default.
> 
>There seems to be an inconsistency in all the various config* files between
> the actual size (it's set =8) and the related comment in configure (saying
> 16). Also the INSTALL file talks about a default of 8.
> 
>I noticed in the ChangeLog that default cache size has changed several times
> in previous versions and is 8M since 3.1.28 (?).
> 
> So I have got two questions:
>What would be the desired (minimum reasonable) size with the current
> implementation? (8 M I suppose ;-)
> If one had plenty of RAM, what would be the maximum reasonable size?
> 
> On my WinXP box I can't set '-M' > 64 (gives: Couldn't allocate memory for
> transposition table - No Error) and Gnu Go seems to play faster with 48M
> than with 64M (?)

If you have plenty of RAM, the bigger the better as far as cache size.
BUT if you make the cache size too large, you can cause swapping,
which will cause the program to actually run slower. 8 Mb seems
to be enough.

Looks like we need to revise a comment in configure.in.

Dan