6.0-RELEASE/AMD64 Ram Capacity?

Scott Long scottl at samsco.org
Sat Mar 11 01:46:54 UTC 2006

Nathan Vidican wrote:
> I seem to recall various threads relating to problems with machines 
> running at or above 4GB ram... what if any issues still exist?
> We're currently operating with 2GB ECC Registered PC333 ram, but are 
> finding a fairly constant usage of about 1700MB swap space; like to 
> increase system memory, and installed motherboard supports 16 slots x 
> 2GB DIMMS each (for 32Gb total) - but what about FreeBSD?
> System is running:
>     - Apache (about 10-12 mod_perl httpd's @ 90MB ram each)
>     - Apache (about 20-30 very basic httpds for static stuff @ 12Mb each)
>     - Sendmail, including MimeDefang and SA processes at some 90MB each
>     - MySQL 4.1 running about 70MB Ram
>     - Samba (smbd's running at 30Mb ram each 30-50 in use at any time)
>     - A number of Perl processes ranging from 1Mb - 900Mb each
>     - Other misc, but the above are the major ones
> Just want to make sure no known issues exist (primarily with the above 
> applications), comments anyone?

The ATA driver is still a bit flakey with more than 4GB of RAM, so make 
sure that you are using either a modern SCSI controller or a RAID 


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