On Tue, Sep 20, 2011 at 10:17 AM, Alexey Kovyazin <a...@ib-aid.com> wrote:
> Ann, > ... > > By allocating that much memory to the database page cache, you reduce the > amount of memory available for other uses, like the system page cache. > > if Marcelo wants to achieve better performance, not just put database to > the memory, I think it's good to mention here that performance could be > worse in this case. It can be very bad in case of Classic/SuperClassic and > slightly worse in case of SuperServer (he did not indicate what architecture > he uses and how many users are there). > Two or three other people had offered better suggestions, and in sections of my message that you didn't quote, I did say that using the database page cache to move the database to memory was not a good idea. However what Marcelo asked was how to calculate the cache size to put his whole database in memory. Whether or not that's a good idea, it is a straight-forward calculation. > > Certainly such vacuous cases are interesting to discuss, but I think people > in support forum can recognize it as signal to change their Firebird > configurations, which will lead to unforeseen consequences. > > If anyone out there is considering using the Firebird configurations to move an whole database into memory, THAT IS A BAD IDEA! Don't do it. Cheers, Ann [Non-text portions of this message have been removed]
