Hi, Mateusz

I wonder if you might experience same issue as me.
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 <zajak...@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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