varnish 2.1.4 swap and increase in objects:heads.

[Rodrigo Benzaquen]

Hi Taylan, exactly the same is happening to us, we already open a ticket with Varnish software. 

Please let me know if you find a solution. 

Thanks 
Rodrigo 




------------------ 

Rodrigo Benzaquen 
@rbenzaquen 




From: "Taylan Develioglu" <tdevelioglu at ebuddy.com> 
To: varnish-misc at varnish-cache.org 
Sent: Viernes, 29 de Octubre 2010 8:37:21 
Subject: varnish 2.1.4 swap and increase in objects:heads. 

Debian Lenny, Linux varnish0 2.6.33.7 #1 SMP Thu Sep 2 15:27:53 CEST 
2010 x86_64 GNU/Linux 

I have a strange situation on one of our varnish servers. 

We recently raised the expiry on previously uncached content a 
(Cache-Control: max-age=0, to Cache-Control: max-age=5). 

The number of objects vs. heads increased and the system started 
swapping (vm.swappiness=0). 

http://lcontent.ebuddy.com/varnish/memory-week.png 
http://lcontent.ebuddy.com/varnish/varnish_objects-week.png 
http://lcontent.ebuddy.com/varnish/varnish_expunge-week.png 


I don't understand why this is happening, bug maybe ? 

DAEMON_OPTS="-a :27535 \ 
-T localhost:6082 \ 
-f /etc/varnish/default.vcl \ 
-s file,/var/cache/varnish/sda/varnish_storage.bin,135G \ 
-s file,/var/cache/varnish/sdb/varnish_storage.bin,135G \ 
-s file,/var/cache/varnish/sdc/varnish_storage.bin,135G \ 
-s file,/var/cache/varnish/sdd/varnish_storage.bin,135G \ 
-s file,/var/cache/varnish/sde/varnish_storage.bin,135G \ 
-s file,/var/cache/varnish/sdf/varnish_storage.bin,135G \ 
-p thread_pools=4 \ 
-p thread_pool_min=200 \ 
-p thread_pool_max=2400 \ 
-p thread_pool_add_delay=2 \ 
-p lru_interval=20" 



---vcl--- 
sub vcl_recv { 
unset req.http.cookie; 
unset req.http.Authorization; 

if (req.http.host ~ "^.*host.domain.com.*") { 
set req.http.host = "host.domain.com"; 
} 

if (req.request == "HEAD") { 
return(pass); 
} 

if (req.request == "PURGE") { 
if (!client.ip ~ purge) { 
error 405 "Not allowed."; 
} 
return(lookup); 
} 

if (req.request == "GET" && req.url == "/monitor") { 
error 200 "OK."; 
} 

if (req.backend.healthy) { 
set req.grace = 30s; 
} else { 
set req.grace = 48h; 
} 

} 

sub vcl_fetch { 
if (beresp.status == 404 || beresp.status >= 300) { 
return (pass); 
} 
set beresp.grace = 48h; 

} 

sub vcl_hit { 
if (req.request == "PURGE") { 
set obj.ttl = 0s; 
error 200 "Purged."; 
} 
} 

sub vcl_miss { 
if (req.request == "PURGE") { 
error 404 "Not in cache."; 
} 
} 
---EOF--- 


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