In the last episode (May 09), Benjamin Adams said:
> Hello zfs question about memory.
> I heard zfs is very ram hungry.
> Service looking to run:
> - nginx
> - postgres
> - php-fpm
> - python
>
> I have a machine with two quad core cpus but only 4 G Memory
>
> I'm looking to buy more ram now.
> What would be the recommend amount of memory for zfs across 6 drives on
> this setup?
As much as is reasonable to purchase. Postgres would probably appreciate
the memory more than ZFS. You can run ZFS on memory-limited machines (I've
gone as far down as 256MB), but the critical part is running a 64-bit
kernel. ZFS does a lot of kernel malloc/free operations, and address space
fragmentation on a 32-bit system will eventually cause a panic when ZFS
can't malloc a contiguous 128k chunk.
--
Dan Nelson
[email protected]
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