Re: [Firebird-devel] FB 2.1 64bit and memory usage ??

[Vlad H. <hv...@us...>]

> What would happen if one defines more than 128k pages in 32 bit builds ? 
> just ignore and use 128k or abort with a invalid configuration parameter ?

    Silently ignore and use upper limit (128K)
 
> There are any plans to provide bigger page sizes ? (32kb, 64kb)

    I think it worth to consider for next ODS
 
> A kind of "support question" but anyone has any idea of the effects of 
> "double caching" ? FB uses RAM to cache MRU pages in it's own cache, OS 
> uses RAM to hold MRU disk clusters/blocks, wouldn't the "hot" disk 
> blocks tend to be the same data as the hot database pages on a machine 
> that runs only FB ? (I think this is the kind of use when one wishes FB 
> to use massive amounts of RAM)

    Look at second part of 
"RFC: Look-ahead disk space allocation and no use of file system cache"
from Jan 24, 2007

    This second part is implemented (for Windows only) but still not committed

Regards,
Vlad