thank you brandon, great info! On Nov 19, 8:06 pm, "Brandon Wirtz" <drak...@digerat.com> wrote: > Now that it has been up for a few hours. > > Cache hit rate would be a lot higher but this app serves a lot of search > queries which are Robo-Generated if that traffic were ignored we'd be > sailing along at about 60% EdgeCache Hits for the first hours of testing. > This is on our "pre-production" service so we'll bake for a bit before we > have numbers across all the entire service in a more "natural" environment. > We also have to populate the cache at this point and we don't yet know how > long that takes which may raise the numbers even more. > > From: google-appengine@googlegroups.com > [mailto:google-appengine@googlegroups.com] On Behalf Of Jeff Schnitzer > Sent: Saturday, November 19, 2011 3:57 PM > To: google-appengine@googlegroups.com > Subject: Re: [google-appengine] Cached Requests > > Wow, this is exactly the kind of information I have been desperately looking > for. If you're ever in the Bay Area I will buy you as many drinks as you > can stand. Or sit. Or pass out into some hottie's lap. > > Jeff > > On Sat, Nov 19, 2011 at 6:42 PM, Brandon Wirtz <drak...@digerat.com> wrote: > > I have fought back and forth with issues related to the Edge cache. > Sometimes it would work, sometimes it wouldn't sometimes it would hold on to > files way too long. > > Well it hadn't been working at all for like 6 weeks, and I didn't mess with > it, but I got around to it today. > > If you want edge caching to work you need to make sure you have done the > following things > > 1. Set Public If you don't set public it won't be cached ever. > > 2. Set a max-age . If you set public but don't specify max-age it > won't be cached > > 3. Use a comma. public, max-age=300 works fine. Public; max-age=300 > does not. > > 4. Set an age greater than 60. 61 seems to cache. 60 does not. There > is probably some volume to will I cache based on expiration but 61 seconds > at the volumes we run seems to cache and 60 doesn't ever seem to. > > 5. Set an age less than 366 days. 364 days seems to work 365 works > most the time 366 never seems to work. So those "Expire never" kinds of > posts people talk about for versioned assets that never expire. Well 10 > years is not the right answer. > > 6. Expires with a date, doesn't seem to help, and seemingly may > prevent caching in some instances. I think this may be clock drift. Or > something about how picky the parser is about the format of the date. > Things that work in browsers don't always work correctly in the edgecache. > (like the Semi vs the comma) > > 7. Set both Pragma and Cache-Control If Pragma is not set Public then > Cache-Control seems to be ignored. > > This is all way more info than you probably need, but. Here is the relevant > code. > > Here is the python code to set headers for caching (CACHE_EXPIRE is a > variable we set based on the page type) > > self.response.headers['Cache-Control'] = 'public, max-age=%d' % > CACHE_EXPIRE > > self.response.headers['Pragma'] = 'Public' > > This is also available > athttp://www.xyhd.tv/2011/11/industry-news/setting-cache-control-header... > thon-to-take-advantage-of-google-appengines-edgecache/ > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appengine@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com > <mailto:google-appengine%2bunsubscr...@googlegroups.com> . > For more options, visit this group > athttp://groups.google.com/group/google-appengine?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appengine@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group > athttp://groups.google.com/group/google-appengine?hl=en. > > image001.png > 27KViewDownload
-- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
