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@siemens.com --------------------------------------------------Received on Wed Apr 20 2005 - 05:36:56 MDT
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