Re: [squid-users] squid on 64 bit server: memory calculation differences with the FAQ?

Adam wrote:
>
> Hello,
>
> I sized my cache_dir and cache_mem based on the FAQ, whose words I
> interpreted to this formula:
> (( 10 * "total GB of cache_dirs" ) + cache_mem + 20 ) * "double for total
> physical RAM"
>
> Applying this to my own system I get:
> (( 10 * 7 ) + 374 + 20 ) * 2 = 928MB which I think is pretty good/close
> since I have 1024MB.
>
> However the FAQ comment "more [RAM] on 64 bit servers such as Alpha" makes
> me wonder by what amount of "more" I should be calculating. That is if 64
> bit machines like the Solaris 8 Ultra 60 box I am running Squid on needed
> (hypothetically) 15 * total GB then, then I'd want to either lower my
> cache_mem and/or total cache GB so as to fall as closely to 1024MB of RAM.
> Or am I applying the above "rule" to rigorously and shouldn't worry so much
> about the "double for total physical RAM" part? So to properly calculate
> cache_mem and cache_dir, I am wondering how the other values would differ
> for my 64 bit server.
>
> Secondly, are there any advantages to running Squid in 64bit mode? The box
> has the 64 bit OS but I've compiled Squid in 32bits because I didn't know of
> any concrete advantages and I know that Oracle 64 bit requires twice the RAM
> of 32 bit and didn't want to just waste RAM if the 32 bit version would run
> fine. I have both compilers on the dev box: one 32 and one is 64 bit
> (needed for lsof). So is there any advantage to running a 64 bit version
> and regardless of which version I run (32bit or 64bit) does the fact I am
> running on a 64bit OS change the above memory requirements/formula? By the
> way, the total RAM needs of the non-squid processes seems to be about 35MB
> RSS (33MB RES per top) and 91MB SZ (total size in virtual memory, also 91MB
> per top).
>

 Basically there are no off hand computational reasons to run squid
 in 64bit mode, and it's I/O needs may be more important too in
 terms of what the software does.

 I don't think there will be any benefit from running squid in 64bit
mode.

 M.

> thanks,
>
> Adam

-- 
 'Love is truth without any future.
 (M.E. 1997)