Re: [zfs-discuss] ZFS- When do you add more memory?

2009-12-23 Thread Bob Friesenhahn
On Wed, 23 Dec 2009, Yanjun (Tiger) Hu wrote: Hi Jim, I think Tony was asking a very valid question. It reminds me http://developers.sun.com/solaris/articles/sol8memory.html#where. The question is valid, but the answer will be misleading. Regardless of if a memory page represents part of a

Re: [zfs-discuss] ZFS- When do you add more memory?

2009-12-23 Thread Jim Laurent
Think he's looking for a single, intuitively obvious, easy to acces indicator of memory usage along the lines of the vmstat free column (before ZFS) that show the current amount of free RAM. On Dec 23, 2009, at 4:09 PM, Jim Mauro wrote: > Hi Anthony - > > I don't get this. How does the presen

Re: [zfs-discuss] ZFS- When do you add more memory?

2009-12-23 Thread Yanjun (Tiger) Hu
Hi Jim, I think Tony was asking a very valid question. It reminds me http://developers.sun.com/solaris/articles/sol8memory.html#where. Regards, Tiger Jim Mauro wrote: Hi Anthony - I don't get this. How does the presence (or absence) of the ARC change the methodology for doing memory capacit

Re: [zfs-discuss] ZFS- When do you add more memory?

2009-12-23 Thread Jim Mauro
Hi Anthony - I don't get this. How does the presence (or absence) of the ARC change the methodology for doing memory capacity planning? Memory capacity planning is all about identifying and measuring consumers. Memory consumers; - The kernel. - User processes. - The ZFS ARC, which is technically