Martin MC Brown wrote: > On 20 Feb 2008, at 19:26, Matt.Ingenthron at Sun.COM wrote: > > >> Jyri Virkki wrote: >> >>> Matt Ingenthron wrote: >>> >>> >>>> I believe we'll need to deliver both, and there are probably still a >>>> number of reasons (for now) that one may choose to run 32-bit even >>>> on a >>>> system with a 64-bit ISA, which means there has to be a switch >>>> somewhere >>>> to pick what one wants to run. >>>> >>>> >>> As you say, I doubt 64bit is universally always the right answer for >>> every conceivable scenario, so there needs to be some sort of switch. >>> >>> So the question becomes what should be the out-of-box default. >>> Barring >>> compelling arguments otherwise, I'll always argue for consistency >>> (which seems to be the direction the proposal is going). >>> >>> Peter mentioned better performance on x86 which may well be a >>> compelling argument depending on the details. The db team should >>> research this so there's enough data to declare it one way or the >>> other. >>> >>> >> Agreed, and I apologize for hijacking this thread into a general >> 32/64-bit concern in my last email. We should have some data to work >> with, and from history with MySQL, I think this is available/easy to >> obtain. Anything that is usually deployed in a read-mostly fashion >> and >> can have a large memory cache is pretty easy to make an argument for. >> >> Regarding consistency though, it could be entirely appropriate for >> MySQL >> to default to 64-bit on capable platforms, while other parts of the >> stack deliver in 32-bit by default as they currently do, right? >> > > See my last mail - but in short, no, I don't see any reason why not. > > >> This is predicated on having data on which to base this decision >> though. >> > > > If somebody wants me to do any necessary tests with the various MySQL > versions and SPARC/intel combinations with 32bit/64bit let me know. > Yes, if you have any chance of doing that, it would be great!
Regards, Jan S > MC > > -- > Martin 'MC' Brown, mc at mcslp.com > Everything MCslp: http://planet.mcslp.com > > > _______________________________________________ > databases-discuss mailing list > databases-discuss at opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/databases-discuss >
