RE: [squid-users] Slowness, idnsSendQuery and "No buffer space av ailable"

> -----Original Message-----
> From: Doug Darrah [mailto:doug@deskpoet.com]
> Sent: Friday, June 17, 2005 5:06 AM
> To: squid-users@squid-cache.org
> Subject: [squid-users] Slowness, idnsSendQuery and "No buffer space
> available"
>
>
> Hi,
>
> Lately, on some BSDi-based (4.1 BSDI BSD/OS 4.1 i386) squids I help
> support, we've been seeing dramatic slowdown in squid performance. From
> one of the afflicted systems' cachemgr 60min report:
>
> client_http.hits = 18.376455/sec
> client_http.errors = 0.013243/sec
> client_http.kbytes_in = 81.341042/sec
> client_http.kbytes_out = 1117.131508/sec
> client_http.all_median_svc_time = 1.311657
> seconds client_http.miss_median_svc_time = 1.542425 seconds
> client_http.nm_median_svc_time = 0.399283 seconds
> client_http.nh_median_svc_time = 1.242674 seconds
> client_http.hit_median_svc_time = 0.469653 seconds
>
> Normally, the median SVC time is much lower, like a full second lower.
> Coinciding with this, we've been seeing this in the cache.log:
>
> 2005/06/09 21:08:49| idnsSendQuery: FD 5: sendto: (55) No buffer space
> available
> 2005/06/09 21:08:49| comm_udp_sendto: FD 5, 192.168.1.2, port 53:
> (55) No buffer space available
>
> These errors aren't seen during non-business hours; only under "normal"
> load. I've Googled and searched the list, and haven't found anything
> exactly like this. Further, I'm relatively new to supporting squid, so I
> don't know exactly what this means. Any help is appreciated.
>
> Doug

It seems that your squid server is having trouble open sockets to make DNS
queries. Then again, I'm not very knowledgeable of BSD.

You might find this thread helpful (or at the very least, slightly related):

http://www.experts-exchange.com/Operating_Systems/FreeBSD/Q_21111952.html

Chris
Received on Fri Jun 17 2005 - 13:08:08 MDT