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From Bryan Call <bc...@apache.org>
Subject Re: very long cache_open_read_end - timeout
Date Fri, 23 Feb 2018 19:21:28 GMT
Veiko,

How many volumes did you create?

-Bryan

> On Feb 23, 2018, at 3:14 AM, Veiko Kukk <veiko.kukk@gmail.com> wrote:
> 
> Hi, Mateusz
> 
> I wonder if you might experience same issue as me.
> https://github.com/apache/trafficserver/issues/3057 <https://github.com/apache/trafficserver/issues/3057>
> 
> For me, solution, or I would rather call it workaround was to create volumes.
> 
> Unfortunately, documentation regarding to storage performance issues/tuning is missing.
> 
> Best regards,
> Veiko
> 
> 
> 2018-02-22 13:59 GMT+02:00 Mateusz Zajakala <zajakala@gmail.com <mailto:zajakala@gmail.com>>:
> Hi,
> 
> I have a problem - from time to time my ATS 7.2.1 has problems with serving static files
from origin, client transactions last over 10s and I see the following diagnostic (I have
enabled logging "slow requests")
> 
>  cache_open_read_begin: 0.000 cache_open_read_end: 10.640
> 
> Any requests to the same URL are blocked for over 10s. Restarting ATS solves the problem.
> 
> What does it mean? Does it have to do with open_read feature?  but the timeouts don't
add...
> 
> Any suggestions appreciated!
> 
> Here's my records.config with configs related to avoiding thundering herd...
> 
> CONFIG proxy.config.cache.enable_read_while_writer INT 1
> CONFIG proxy.config.http.background_fill_active_timeout INT 0
> CONFIG proxy.config.http.background_fill_completed_threshold FLOAT 0.000000
> CONFIG proxy.config.cache.read_while_writer.max_retries INT 5
> CONFIG proxy.config.cache.read_while_writer_retry.delay INT 200
> CONFIG proxy.config.http.cache.max_open_read_retries INT 5
> CONFIG proxy.config.http.cache.open_read_retry_time INT 200
> 
> CONFIG proxy.config.http.cache.open_write_fail_action INT 2
> 
> 


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