On Wed, Nov 17, 2010 at 10:03:38AM +0100, Miko?aj Radzewicz wrote: > Hello, > Willy, thanks for you email. I will try to fight with the opts and > memory? I hope it helps also for "low memory". We have 4GB on our 2 > nodes servers.
OK so with 4GB, you're working in PAE mode and it's quite possible to have low mem issues (sometimes, some drivers can't use high mem either and have to reserve some space in low memory). I'm used not to go higher than 2 GB on 32 bits, I split my user/kernel memory at 2G and that way there is no such high/low mem issue. Sometimes, going up to 3G can be fine, but it has some downsides. Overall I consider that above 2G you need to switch to 64bits. Also, you don't need to reinstall your system to switch to 64bit. My PC is installed in 32-bit but only has a 64-bit kernel with the 32-bit compatilibity enabled. That's enough to use all the memory, with a limit of a few gigs per process, which is more than enough for many usages ! Regards, Willy
