Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-28 Thread Shawn Walker
Mario Goebbels wrote: I bet zfs complicates things, given that it will suck up quite a lot of memory (although it's supposed to give some back if things get too tight). Yet it doesn't appear to give back memory as needed. My desktop machine has 8GB of RAM. a) For lotsa caching and b) because

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-28 Thread Mario Goebbels
I bet zfs complicates things, given that it will suck up quite a lot of memory (although it's supposed to give some back if things get too tight). Yet it doesn't appear to give back memory as needed. My desktop machine has 8GB of RAM. a) For lotsa caching and b) because I can (and RAM was chea

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-28 Thread Richard L. Hamilton
> Now, one of my questions remains a mystery: why did > the system initially stop > giving out virtual memory when it hit approx half of > its RAM (8Gb of 16Gb) > and no swap space was enabled? Was it just a > coincidence? > > Jim Laurent suggests that Solaris can be configured > without swap wha

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-27 Thread Jim Klimov
Now, one of my questions remains a mystery: why did the system initially stop giving out virtual memory when it hit approx half of its RAM (8Gb of 16Gb)? Was it just a coincidence? Jim Laurent suggests that Solaris can be configured without swap whatsoever, and I thought so too - until I hit thes

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-27 Thread Jim Klimov
First of all, thank you all for the links and suggestions. The first two comments in Jim Laurent's entry do seem like they are about my situation :) As they write, "It is possible to be out of swap without being out of memory ... because memory allocations count immediately against swap but do

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-25 Thread m...@bruningsystems.com
Hi, Mike Gerdts wrote: On Sat, Apr 25, 2009 at 2:01 AM, Shawn Walker wrote: Anon Y Mous wrote: as we tested scaling and put more load on the servers (i.e. allowing Apache to spawn more children), we were surprised to see that the system doesn't tend to go below 8Gb (half) of the avail

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-25 Thread Mike Gerdts
On Sat, Apr 25, 2009 at 2:01 AM, Shawn Walker wrote: > Anon Y Mous wrote: >>> >>> as we tested scaling and put more load on the servers (i.e. allowing >>> Apache to spawn more children), we were surprised to see that the system >>> doesn't tend to go below 8Gb (half) of the available RAM. Further

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-25 Thread Shawn Walker
Anon Y Mous wrote: as we tested scaling and put more load on the servers (i.e. allowing Apache to spawn more children), we were surprised to see that the system doesn't tend to go below 8Gb (half) of the available RAM. Further requests for memory allocation failed (can't fork new processes incl

Re: [osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-24 Thread Anon Y Mous
> as we tested scaling and put more load on the servers (i.e. allowing > Apache to spawn more children), we were surprised to see that the system > doesn't tend to go below 8Gb (half) of the available RAM. Further requests > for memory allocation failed (can't fork new processes including new ss

[osol-discuss] Question about (Open)Solaris VM - why is swap required?

2009-04-24 Thread Jim Klimov
I think I am misunderstanding something about Solaris virtual memory... I was running some tests on our new T5120 with 16Gb RAM with Solaris 10u6 (and previously got in the same situation with an X4600 and OpenSolaris 105): when the systems arrived, we assumed they have "lots of RAM" for our task