On Mon, Apr 25, 2011 at 12:49 PM, Amit Sharma <amit_...@yahoo.com> wrote:
> Hi, > > Couple of questions: > > 1. SWAP partition must always be 2 x RAM? My machien has 48 GB RAM. I have > to create 96GB SWAP partition? Isn't 4 GB or 8 GB good enough? > 2xRAM is not a hard rule, you can have any amount of swap space. In your case, since you have a large amount of RAM you'll hardly need the swap space so ~10G should be good enough. However, if you're working with several large files (think enterprise mysql servers) at the same time, you might gain from a larger swap. I'll suggest using LVM so you can resize partitions and start out with something like 6-8G. If you see swap usage above 80%, increase the size of swap. Also, if you have multiple disks it's better if you have multiple swap partitions spread over all the disks. > > > 2. tempfs consumes half of RAM i.e. 24GB in my case as I have 48 GB of > physical RAM installed. Can I reduce it to say 8GB? Can it be done? How? Is > it recommended to reduce tempfs? > Tmpfs size is by default half the size of RAM, but this isn't the used memory. 24G is the largest size of a single file in tmpfs which itself can grow or shrink on demand. If you aren't working with files of size +8G, there is no use of having this large a tmpfs. But, if you have a smaller tmpfs, it's better to keep a larger swap space, as files are swapped from tmpfs to disk, which is very slow. To resize, you can edit /etc/fstab and include "size=8G" in the options column. Or, like this: mount -o remount,size=8G /tmp Since you have large enough RAM, I'd recommend a large (12G) tmpfs and a smaller swap (8G), but again this depends on what you're using the machine for. > regards, > Amit Sharma > > > Thanks and Regards, > Amit Sharma > > _______________________________________________ > Ilugd mailing list > Ilugd@lists.linux-delhi.org > http://frodo.hserus.net/mailman/listinfo/ilugd > -- -- Ankit Chaturvedi GPG: 05DE FDC5 468B 7D9F 9F45 72F1 F7B9 9E16 ECA2 CC23 <http://www.google.com/profiles/ankit.chaturvedi> _______________________________________________ Ilugd mailing list Ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd
