Alert on certain error like 503

[Geoff Simmons]

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On 06/17/11 11:50 AM, Mattias Geniar wrote:
>> What we do is to write to syslog:
>>
>> C{ #include <syslog.h> }C
>> ...
>> sub vcl_error {
>> 	C{ syslog(LOG_ERR, "Varnish vcl_error"); }C
>> 	...
>> 	return(deliver);
>> }
>>
> 
> Have you had a chance to test how that relates to performance when you
> start to get a lot of errors being thrown? I can imagine pushing every
> error to syslog can become a bottleneck when it reaches a certain
> amount?

If all you want is a syslog entry any time vcl_error() is called, just
scan varnishlog for occurrences of VCL_call matching error. There's no
reason to tie up the varnishd demon with calls to syslog() just for that.


Best,
Geoff
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