Re: SWAP Question?

2009-08-12 Thread Midnite Mac (.com)
Thank you, Roy! On Aug 12, 2009, at 2:19 AM, Roy Sigurd Karlsbakk wrote: > On 10. aug.. 2009, at 23.28, Michael S. Mason wrote: > >> Hello All, >> >> My name is Michael, >> >> I have a new Dell Server that I am about to install Ubuntu 9.04 >> Server >> AMD64 onto. I have 4 GB's of RAM. My qu

Re: SWAP Question?

2009-08-12 Thread Roy Sigurd Karlsbakk
On 10. aug.. 2009, at 23.28, Michael S. Mason wrote: > Hello All, > > My name is Michael, > > I have a new Dell Server that I am about to install Ubuntu 9.04 Server > AMD64 onto. I have 4 GB's of RAM. My question? Is there any need for a > SWAP partition with 4GB's of RAM? Hi I see you have got

Re: SWAP Question?

2009-08-11 Thread Jim Tarvid
There are no rules. Google's servers are typically two cores with 4GB. They prefer numbers to iron per server. One can always trade cache for CPU and disk IO. On one of my servers, query_cache_size= 256M, eliminated prunes and got me an 8:1 hit to insert ratio. You might experiment to fin

Re: SWAP Question?

2009-08-11 Thread Mark van Harmelen
Hi everyone On Mon, Aug 10, 2009 at 11:06 PM, Hakan Koseoglu wrote: > 4GB of RAM is not much > for a busy database application Are there any rules of thumb or formulae for a good performant RAM size (per core?) for a busy data base server, mySQL is the database in question. In this scena

Re: SWAP Question?

2009-08-11 Thread Hakan Koseoglu
On Tue, Aug 11, 2009 at 12:36 PM, Jarl Friis wrote: > Hakan Koseoglu writes: >> In reality if you are swapping that much in and out, your server >> performance will be quite severely effected. > Correct, but in that situation the alternative to have swap available, > would be that the application

Re: SWAP Question?

2009-08-11 Thread Jarl Friis
Hakan Koseoglu writes: > Hi Michael, > On Mon, Aug 10, 2009 at 10:28 PM, Michael S. Mason wrote: >> I have a new Dell Server that I am about to install Ubuntu 9.04 Server >> AMD64 onto. I have 4 GB's of RAM. My question? Is there any need for a >> SWAP partition with 4GB's of RAM? > It depends on

Re: SWAP Question?

2009-08-10 Thread Michael S. Mason
Cool, thank you ALL for your quick replies! Enjoy the rest of your day... Regards, Michael On Aug 10, 2009, at 3:04 PM, John Klockenkemper wrote: Michael, Stick to the default swap like Jim recommended. It is always a good idea to have swap, even though you may never use it.

Re: SWAP Question?

2009-08-10 Thread Hakan Koseoglu
Hi Michael, On Mon, Aug 10, 2009 at 10:28 PM, Michael S. Mason wrote: > I have a new Dell Server that I am about to install Ubuntu 9.04 Server > AMD64 onto. I have 4 GB's of RAM. My question? Is there any need for a > SWAP partition with 4GB's of RAM? It depends on what you are going to use it for.

Re: SWAP Question?

2009-08-10 Thread Michael S. Mason
So, I should choose NO SWAP partition? Or stick with a default swap with a guided partition? Also, should I choose to use LVM (Logical Volume Management)? Thanks again! On Aug 10, 2009, at 2:36 PM, Jim Tarvid wrote: No. A modest amount of swap may permit the OS to work itself out of memory

Re: SWAP Question?

2009-08-10 Thread Jim Tarvid
No. A modest amount of swap may permit the OS to work itself out of memory contention. A large amount of swap permits the OS to dig itself into deeper and deeper trouble. The defaults are rarely an issue. On one server of mine: r...@galax:/var/lib/mysql/lsnet# free total used

SWAP Question?

2009-08-10 Thread Michael S. Mason
Hello All, My name is Michael, I have a new Dell Server that I am about to install Ubuntu 9.04 Server AMD64 onto. I have 4 GB's of RAM. My question? Is there any need for a SWAP partition with 4GB's of RAM? Thanks, Michael -- ubuntu-server mailing list ubuntu-server@lists.ubuntu.com https: