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Re: [squid-users] Help understanding calamaris/squid output

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Hi,
maybe you should use the new calamaris version. It tells you some
perfomance values like 'Proxy efficiency' and 'speed increase'. You also
get infomation about your refresh_pattern in the 'Requested extensions'
report. Here you will see how many of the cached objects are stale or
fresh.
The 'Proxy efficiency' factor tells you how fast  your squid is with
cached objects.

Regards Michael

On Mon, 2005-04-18 at 18:40, Scott Presnell wrote:
> HI Folks,
> 	I'm running Squid Cache: Version 2.5.STABLE7 under NetBSD 2.0
> and I'm using calamaris to try and track performance.  Calamaris seems
> to be telling me that my TCP_REFRESH_HIT speed performance is poor; actually
> lower than my MISS performance.  I have some questions: 
> 
> 1) Why would this be true?  Overhead of the IMS test + the actual request?
> local disk performace issues?  What can I do to further interrogate and increase
> the performance of this kind of request/response?
> 
> 2) Given the definition of TCP_REFRESH_HIT:
> 
>  The requested object was cached but STALE. The IMS query for the object resulted in "304 not modified".
> 
> .. then what is the difference between TCP_REFRESH_HIT/200 and TCP_REFRESH_HIT/304?
> 
> 	Thanks for any help.
> 
> 	- Scott
> 
> # Incoming TCP-requests by status
> status                          request      %  sec/req   Byte       %  kB/sec  
> ------------------------------ --------- ------ ------- -------- ------ ------- 
> HIT                                11599  54.81    0.12 11108299   6.26    7.95 
>  TCP_REFRESH_HIT                    6572  31.06    0.20  6582553   3.71    4.94 
>  TCP_MEM_HIT                        2929  13.84    0.01  2529904   1.43   79.90 
>  TCP_IMS_HIT                        1136   5.37    0.01   262521   0.15   18.61 
>  TCP_HIT                             942   4.45    0.02  1706470   0.96   92.35 
>  TCP_NEGATIVE_HIT                     20   0.09    0.01    26851   0.02  141.74 
> MISS                                7279  34.40    1.53  156276K  90.15   14.00 
>  TCP_MISS                           6579  31.09    1.64  149822K  86.43   13.89 
>  TCP_CLIENT_REFRESH_MISS             462   2.18    0.40  5698990   3.21   29.81 
>  TCP_REFRESH_MISS                    238   1.12    0.80   909725   0.51    4.64 
> ERROR                               2283  10.79    0.72  6372629   3.59    3.78 
>  TCP_MISS                           1718   8.12    0.96  5551109   3.13    3.30 
>  TCP_DENIED                          564   2.67    0.00   819910   0.46  652.03 
>  TCP_REFRESH_MISS                      1   0.00    0.05     1610   0.00   32.09 
> ------------------------------ --------- ------ ------- -------- ------ ------- 
> Sum                                21161 100.00    0.67  173347K 100.00   12.23 
> 
> My refresh_pattern(s) look like this:
> 
> refresh_pattern -i \.jpe?g$     1440    50%     10080 reload-into-ims
> refresh_pattern -i \.tiff?$     1440    50%     10080 reload-into-ims
> refresh_pattern -i \.gif$       1440    50%     10080 ignore-reload
> refresh_pattern -i \.png$       1440    50%     10080 reload-into-ims
> refresh_pattern -i \.bmp$       1440    50%     10080 reload-into-ims
> refresh_pattern -i \.p(n|b|g|p)m$ 1440  50%     10080 reload-into-ims
> refresh_pattern .               30      50%     10080
> 
> 
> Example TCP_REFRESH_HITs:
> 
> 1113779628.851    240 192.168.37.165 TCP_REFRESH_HIT/200 648 GET http://www.google.com/nav_current.gif - DIRECT/www.google.com text/html
> 1113779628.876    257 192.168.37.165 TCP_REFRESH_HIT/200 1306 GET http://www.google.com/nav_first.gif - DIRECT/www.google.com text/html
> 1113779628.902    284 192.168.37.165 TCP_REFRESH_HIT/200 645 GET http://www.google.com/nav_page.gif - DIRECT/www.google.com text/html
> 1113779628.924    259 192.168.37.165 TCP_REFRESH_HIT/200 1787 GET http://www.google.com/nav_next.gif - DIRECT/www.google.com text/html
> 1113779629.092    241 192.168.37.165 TCP_REFRESH_HIT/200 2905 GET http://www.google.com/images/gds1.gif - DIRECT/www.google.com text/html
> 1113777949.633    323 192.168.37.58 TCP_REFRESH_HIT/304 165 GET http://www.bankofamerica.com/global/mvc_objects/stylesheet/masthead.css - DIRECT/www.bankofamerica.com -
> 1113777949.681    356 192.168.37.58 TCP_REFRESH_HIT/304 165 GET http://www.bankofamerica.com/global/hs_home/signin.js - DIRECT/www.bankofamerica.com -
> 1113777950.138    185 192.168.37.58 TCP_REFRESH_HIT/304 165 GET http://www.bankofamerica.com/global/js/fontsize.js - DIRECT/www.bankofamerica.com -
> 1113777950.466    200 192.168.37.58 TCP_REFRESH_HIT/304 165 GET http://www.bankofamerica.com/x.gif - DIRECT/www.bankofamerica.com -
> 1113777950.470    197 192.168.37.58 TCP_REFRESH_HIT/304 165 GET http://www.bankofamerica.com/global/mvc_objects/images/mhd_reg_logo.gif - D
-- 
Mit freundlichen Grüssen / With kind regards

Michael Pophal
--------------------------------------------------
Topic Manager
Internet Access Services & Solutions
--------------------------------------------------
Siemens AG, ITO A&S 4
Telefon: +49(0)9131/7-25150
Fax:     +49(0)9131/7-43344
Email:   michael.pophal@xxxxxxxxxxx
--------------------------------------------------


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