Re: [squid-users] limit squid memory ram use - squid becomes slow when ram full

The cache_mem parameter is 10 MB so the cached objects in memory are 10 MB.
The cache_dir is 10 GB so the cached objects on disk are 10 GB.
Most likely squid is slow because of the I/O.

If you have 16 GB of memory and a 64-bit OS and 64-bit Squid you can set
cache_mem to 4 GB to have a lot more objects in memory and reduce I/O.

On Linux aufs is faster than ufs for cache_dir and on BSD diskd is faster than ufs.

To tune cache_mem properly the FAQ is highly recommended:
http://wiki.squid-cache.org/SquidFaq/SquidMemory

Marcus

rpereyra_at_lavabit.com wrote:
> Hi
>
> How I can limit the ram memory use in my squid/tproxy box ?
>
> I have a fast server with 16Gb ram. The average bandwidth is about 60-70
> Mb/s.
>
> The bridge works well but when the cache and memory becomes full its goes
> slow and becomes unusable.
>
> The cache is 10G size.
>
> I see that a few hours to be working and have used the 16 GB of RAM
> starts to run slow.
>
> Any help ?. I have configured some memory optimization options but looks
> don't help for me.
>
> Thanks in advance
>
> roberto
>
> This is my config:
>
> -------------------------------------
>
> cache_mem 10 MB
> memory_pools off
> cache_swap_low 94
> cache_swap_high 95
>
> #
> # Recommended minimum configuration:
> #
> acl manager proto cache_object
> acl localhost src 127.0.0.1/32
> acl localhost src ::1/128
> acl to_localhost dst 127.0.0.0/8 0.0.0.0/32
> acl to_localhost dst ::1/128
>
> # Example rule allowing access from your local networks.
> # Adapt to list your (internal) IP networks from where browsing
> # should be allowed
> acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
> acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
> acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
> acl localnet src fc00::/7 # RFC 4193 local private network range
> acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
>
> acl net-g1 src 200.117.xxx.xxx/24
> acl net-g2 src 200.xxx.xxx.xxx/24
> acl net-g3 src 190.xxx.xxx.xxx/24
>
> acl SSL_ports port 443
> acl Safe_ports port 80 # http
> acl Safe_ports port 21 # ftp
> acl Safe_ports port 443 # https
> acl Safe_ports port 70 # gopher
> acl Safe_ports port 210 # wais
> acl Safe_ports port 1025-65535 # unregistered ports
> acl Safe_ports port 280 # http-mgmt
> acl Safe_ports port 488 # gss-http
> acl Safe_ports port 591 # filemaker
> acl Safe_ports port 777 # multiling http
> acl CONNECT method CONNECT
>
> #
> # Recommended minimum Access Permission configuration:
> #
> # Only allow cachemgr access from localhost
> http_access allow manager localhost
> http_access deny manager
>
> # Deny requests to certain unsafe ports
> http_access deny !Safe_ports
>
> # Deny CONNECT to other than secure SSL ports
> http_access deny CONNECT !SSL_ports
>
> # We strongly recommend the following be uncommented to protect innocent
> # web applications running on the proxy server who think the only
> # one who can access services on "localhost" is a local user
> #http_access deny to_localhost
>
> http_access allow net-g1
> http_access allow net-g2
> http_access allow net-g3
>
> #
> # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
> #
>
> # Example rule allowing access from your local networks.
> # Adapt localnet in the ACL section to list your (internal) IP networks
> # from where browsing should be allowed
> http_access allow localnet
> http_access allow localhost
>
> # And finally deny all other access to this proxy
> http_access deny all
>
> # Squid normally listens to port 3128
> http_port 3128
> http_port 3129 tproxy
>
>
> # We recommend you to use at least the following line.
> hierarchy_stoplist cgi-bin ?
>
> # Uncomment and adjust the following to add a disk cache directory.
> cache_dir ufs /var/spool/squid 10000 64 256
>
> #access_log /var/log/squid/access.log squid
> access_log none
>
> cache_log /var/log/squid/cache.log
>
>
>
> # Leave coredumps in the first cache dir
> coredump_dir /var/spool/squid
>
> # Add any of your own refresh_pattern entries above these.
> refresh_pattern ^ftp: 1440 20% 10080
> refresh_pattern ^gopher: 1440 0% 1440
> refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
> refresh_pattern . 0 20% 4320
>
>
>
>
>
Received on Mon Apr 11 2011 - 16:35:36 MDT