You'd be surprised - it was dropping only a few of the total 300
requests / sec...
On 11.01.2011 01:07, Caunter, Stefan wrote:
Even 200 is low if you regularly see a lot of traffic, but that initial setting
would likely have dropped most connections.
Sent from my iPhone
On 2011-01-10, at 19:00, "George Georgovassilis"<[email protected]>
wrote:
Hello Stefan,
Thank you for the hint. Here are the values:
thread_pools = 2
thread_pool_min = 2
thread_pool_max = 200 (was 2 at the time of my initial tests)
thread_pool_add_delay = 2
Regards,
G.
On 11.01.2011 00:48, Caunter, Stefan wrote:
Hi George,
I assumed your management access is on port 6082. Adjust to your configured
varnishd please.
Thread creation and pool size monitoring is essential to handling traffic
spikes. If load test exceeded the configured available maximums varnish will
drop connections, cache hit or no.
A thread is required to answer a network connection. You don't get something
for nothing. Unless varnish has resources to get that cached object, it cannot
do anything for your requesting clients, real or test.
Sent from my iPhone
On 2011-01-10, at 15:55, "George Georgovassilis"<[email protected]>
wrote:
Hello Stefan,
For every of the commands you quoted I'm getting an
connect(): Invalid argument
Connection failed
Why are threads relevant? As I wrote earlier, everything is answered from
within the varnish cache - I thought the entire epolling parade was about
avoiding caches.
I published the threadsettings earlier in this discussion.
Regards,
G.
On 10.01.2011 19:50, Caunter, Stefan wrote:
Yes, and I also don't understand why there is no discussion of threads
here. If we can see
varnishadm -T 6082 param.show thread_pools
varnishadm -T 6082 param.show thread_pool_min
varnishadm -T 6082 param.show thread_pool_max
varnishadm -T 6082 param.show thread_pool_add_delay
it would be helpful.
The only time I've seen varnish drop connections is when it cannot
create threads quickly enough, or has insufficient resources to do so.
Stefan Caunter
e: [email protected] :: m: (416) 561-4871
www.thestar.com
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Kristian
Lyngstol
Sent: January-06-11 4:00 AM
To: George Georgovassilis
Cc: [email protected]
Subject: Re: Connections dropped under load
Hi,
On Wed, Jan 05, 2011 at 04:20:31PM +0100, George Georgovassilis wrote:
I'm having trouble with dropped connections under a loadtest.
We need:
varnishstat -1
Any further discussion without varnishstat -1 output is wild guesswork
and
superstition.
- Kristian
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