[squid-users] how long object size can squid 3.5.2 handle ?

[Amos Jeffries]

On 28/01/2015 7:10 p.m., Ahmad wrote:
> Hi dev ,
> 
> how long object size can squid 3.5.2 handle ??
> 
> it says >>than 32KB
> 

What "it" ?

> 
> is that for memory or  disk caching  or for both ???? 
> 

SMP memory is the only one restricted to 32KB. Because 32KB is the
default UDS (Unix Data Socket) packet size limit, and Squid SMP code is
assuming that limit is in place even if the sysadmin has altered the
kernel to accept larger packets.


> 
> I mean does that mean on memory  the hot object will be >>32KB ? 
> 
>  
> 
> And in  rock store >>32 also ?
> 
>  
> 
> If >>32 Kb how much ?
> 
>  
> 
> 500 Kb ? 1M or more or  less ?
> 
> Just curious and need to know what the max size we can save fo far


Squid-3.5 has 5 cache areas in which HTTP objects can be stored:

* Transients Memory (in-transit objects cache)
* SMP shared memory cache (cache_mem between workers)
* Local memory cache (cache_mem for local worker only)
* Rock disk cache
* UFS disk cache (ufs, aufs, diskd)

Only two of those have *ever* been limited to 32KB (Rock and SMP shared
memory), and in 3.5 that is reduced to one (shared memory cache).

The others are not limited by object size, but by total cache space.

Amos