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From John Plevyak <jplev...@gmail.com>
Subject Re: Cache hit ratios with Polygraph
Date Thu, 08 Sep 2011 18:33:09 GMT
What was the polygraph configuration?

john

On Wed, Sep 7, 2011 at 7:22 AM, Adam Jefferiss <ajefferiss@gmail.com> wrote:

> Hi all,
>
> I'm using Polygraph [1] to run some performance tests against 3.1.0 and
> wondered if anyone can suggest why I'm seeing low hit ratios. According to
> the results client side hit ratios are offered at 21.73% while the measured
> ratio is just 9.63%. The measured result is decreasing through the test
> though (see attached image), which is my main point of concern.
>
> Settings from my records.conf and storage.conf are below, if anyone can
> suggest any config changes that would help it'd be much appreciated.
>
> Thanks,
> Adam
>
> [1] http://www.web-polygraph.org
>
> Cache settings in my records.config:
>
> # grep -i cache records.config | grep -v '#'
> CONFIG proxy.config.http.uncacheable_requests_bypass_parent INT 1
> CONFIG proxy.config.http.down_server.cache_time INT 300
> CONFIG proxy.config.http.cache.http INT 1
> CONFIG proxy.config.http.cache.ignore_client_no_cache INT 0
> CONFIG proxy.config.http.cache.ims_on_client_no_cache INT 1
> CONFIG proxy.config.http.cache.ignore_server_no_cache INT 0
> CONFIG proxy.config.http.cache.ignore_client_cc_max_age INT 0
> CONFIG proxy.config.http.cache.cache_responses_to_cookies INT 1
> CONFIG proxy.config.http.cache.ignore_authentication INT 0
> CONFIG proxy.config.http.cache.cache_urls_that_look_dynamic INT 1
> CONFIG proxy.config.http.cache.enable_default_vary_headers INT 0
> CONFIG proxy.config.http.cache.when_to_revalidate INT 0
> CONFIG proxy.config.http.cache.when_to_add_no_cache_to_msie_requests INT -1
> CONFIG proxy.config.http.cache.required_headers INT 0
> CONFIG proxy.config.http.cache.max_stale_age INT 604800
> CONFIG proxy.config.http.cache.range.lookup INT 1
> CONFIG proxy.config.http.cache.heuristic_min_lifetime INT 3600
> CONFIG proxy.config.http.cache.heuristic_max_lifetime INT 86400
> CONFIG proxy.config.http.cache.heuristic_lm_factor FLOAT 0.10
> CONFIG proxy.config.http.cache.fuzz.time INT 240
> CONFIG proxy.config.http.cache.fuzz.probability FLOAT 0.005
> CONFIG proxy.config.http.cache.vary_default_text STRING NULL
> CONFIG proxy.config.http.cache.vary_default_images STRING NULL
> CONFIG proxy.config.http.cache.vary_default_other STRING NULL
> CONFIG proxy.config.cache.permit.pinning INT 0
> CONFIG proxy.config.cache.ram_cache.size INT 104857600
> CONFIG proxy.config.cache.ram_cache_cutoff INT 4194304
> CONFIG proxy.config.cache.ram_cache.algorithm INT 0
> CONFIG proxy.config.cache.ram_cache.compress INT 0
> CONFIG proxy.config.cache.limits.http.max_alts INT 5
> CONFIG proxy.config.cache.target_fragment_size INT 1048576
> CONFIG proxy.config.cache.max_doc_size INT 0
> CONFIG proxy.config.cache.enable_read_while_writer INT 0
> CONFIG proxy.config.cache.min_average_object_size INT 8000
> CONFIG proxy.config.cache.threads_per_disk INT 8
> CONFIG proxy.config.cache.mutex_retry_delay INT 2
>
>
> My storage.config has:
>
> /var/trafficserver 10000MB
>

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