Jerry McAllister wrote:
If you end up using swap space you will *not* get performance. The
second you start swapping is the second that your performance goes into
a downward spiral, especially with multi-user servers. If 4Gb of main
memory won't cover your needs then get more memory (and go for 64-bit),
or look at using two or more servers. Swap space is for emergencies -
unexpected, infrequent memory load peaks - and if your server starts
using it regularly, it's overwhelmed.
On Thu, Nov 09, 2006 at 06:39:50AM +0100, VeeJay wrote:
.Ideal Space required for MySQL DBs: 140GB.
(Contents: Many MySQL databases backing name based virtual websites)
.Ideal Space required for Virtual Hosted Websites: 140GB
(Contents: HTML, PHP, Images, Mail, Logs, Sites Backups, etc)
Maximum space required for SWAP to get high performance.
Note that Linux (at least newer RedHat) would also tend to put the
virtual host space on /var as well. IMHO, both these ideas are complete
databases tend to be put in /var/db by default, so if you must
have 140 GB database size, then you need a /var of more than 140 GB.
/var is for *system* variable data - package databases, log files, pid
files and all kinds of other *trashable* data. (Yes, mail is an obvious
exception but if you do serious mail you put it on a separate partition
anyway, or use maildir or...).
Mixing up application/user data with /var just makes for
unmaintainability somewhere down the line.
It is much better to keep both your application requirements together,
as suggested here. There is nothing to stop you using one disk (or RAID
array) but just make sure that your application data is in a separate
tree (such as /home) which, personally, I would always put on a separate
partition. For optimum performance, though, you might want one
disk/RAID for the OS and one disk/RAID for the applications.
An easier, or at least more flexible way to deal with it is to get
a very large second disk - about 340 GB - and make one big file
system on it.
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