[Please press enter every 70 chars or so. And please don't top post, and trim the irrelevant quoted material. It makes it easier for everyone else. Thanks.] On 06:39 22 Oct 2003, sam kupar <samkupar@xxxxxxxxxxxxxxxxxx> wrote: | when u are installing redhat9,u have to select swap size;which is | recommended to be double the RAM.have u selected 256MB or more of swap | size.actually i am also having the same configuration as urs and the | things are at a good speed(with background tasks and downloading etc). With anything modern you want RAM+swap == the maximum you're ever likely to run at once (including this that are "up" but idle). The "twice RAM" is simply a rule of thumb. In an ideal world you would have more RAM than you need and never swap (well, "never page", but let's not be picky). In practice you'll generally have more process memory in use than RAM available and so the overflow is stored in swap until needed. You want enough swap to never run out of overflow area, that's all. At any one time you have a "working set" - the pages of programs that are in regular use. If that's bigger than RAM your machine will spend some time paging (exchanging the less wanted data in memory for immediately wanted data in swap or from disc files not currently cached) instead of actually running your programs (because the program will be stalled waiting for its data to come back from the swap area). If your working set needs a lot of swap that "some time" will become "a lot of time" or even "almost all the time", which is called "thrashing". You can always add more swap later as a "swap file" - see "man swapon". More swap will not affect your performance at all, neither faster nor slower. It's simply room to have more programs "up" at a time. Cheers, -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ Newtons 4th law: For every action there is an equal and opposite beaureaucratic policy. - Adrian Tritschler, ajft@xxxxxxxxxxxxx -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
