caching

问题 Im testing how cache-control header works on Chrome. My setup in nginx is quite easy: server { listen 80; server_name localhost; etag on; root /usr/share/nginx/html; location / { add_header Cache-Control "must-revalidate, private, max-age=10"; } } The behaviour I was expecting for the setup would be: max-age: Use cache for the specified time in seconds etag: Use for validating freshness of data private: avoid proxy caches to keep the data With hard-reloads Im getting the expected behaviour: 1

问题 I have an app whose database is being migrated to amazon RDS. I experienced a significant drop of performance, due to the latency of the queries between RDS and our server (like 30s of loading time only because of the queries). There is no explicit caching, and the requests could be optimized a bit more, but this is still more than 10x slower than with a local database. I this kind of performance drop expected? If yes, is there a way to use a cloud database with similar performances as a

问题 I am using rails fragemnet cache to cache some html. Below is my code <% if @link.social_tags.present? %> <% cache(:action =>'pageui', :action_suffix => "#{@link.id}_tags") do %> <% @link.social_tags.each_with_index do |tag, index| %> <%= ", " if index > 0 %> <%= link_to tag.name, some_path(:tag => tag.id), :title => tag.name, :target => "_blank" %> <% end %> <% end %> <% else %> Still no tag for this Page. <% end %> I am getting some weird issue. First time when it doesn't have the fragement

问题 Have this question up on the MSDN forums too (http://social.msdn.microsoft.com/Forums/en-US/netfxbcl/thread/0a666d5e-9bda-47bd-8dd3-98d32eb5fe60/?prof=required), thought I'd get an opinion of folks here : Here's the output of my immediate window : (EmployeeCache as MemoryCache).Add("test", new Object(),DateTimeOffset.Now.AddMinutes(10)); true (EmployeeCache as MemoryCache).GetCount() 0 (EmployeeCache as MemoryCache) {<namespace>.CustomCache} [<namespace>.CustomCache]: {[<namespace>

问题 I understood that L2 cache can't update itself if any update happens in the persistent store. So, Should I call evict2ndLevelCache() method after every write or update methods at DAO layer? Or there is a better strategy? http://howtodoinjava.com/2013/07/02/how-hibernate-second-level-cache-works/ If some user or process make changes directly in database, the there is no way that second level cache update itself until “timeToLiveSeconds” duration has passed for that cache region. In this case,

问题 I have been using the following code to read in a text file from the web: 'import the text file into a string Function DownloadTextFile(URL As String) As String On Error GoTo Err_GetFromWebpage Dim objWeb As Object Dim strXML As String ' Instantiate an instance of the web object Set objWeb = CreateObject("Microsoft.XMLHTTP") ' Pass the URL to the web object, and send the request objWeb.Open "GET", URL, False objWeb.send ' Look at the HTML string returned strXML = objWeb.responseText

问题 I set up a simple local memory cache that I use like this: from django.core.cache import caches def stats_service(db): stats_cache = caches['stats'] if stats_cache.get(db) is None: stats_cache.set(db, GlobalStatsService(db)) return stats_cache.get(db) After the server is running, I call this function through a view, with a curl on the command-line, to initialize the cache. The problem is that if I call it several times, sometimes it will find the item and return the value immediately, as

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . i'm searching for a good java script in-memory cache lib to cache client side calculation results. My requirements: works in Internet Explorer, FireFox, Safari, Opera, Chrome, others a plus stable mature small fast cache strategies should be configurable several caches in one page, each with different eviciton

问题 I implemented RestSharp succesfully in my WP7 application, but one issue remains: When I load resources from the server (for example a GET request on http://localhost:8080/cars), the first time the collection of (in this case) cars is succesfully returned. When I issue the same request for the second time, I always get the same result as the first time - even when the resources have changed in the meantime. When looking at my server, the second time there is no request issued at all. I

问题 I am creating a webpage and whenever I refresh or move from page to page, it keeps on just reloading the cache values. But I don't want it to do that because I am working with dynamic data (from the database) so I want it to reload values from the database each time it refreshes, or whenever any page processing is done. And I don't mean just clearing the browser cache. I don't want my end-users to have to go to Tools each time they use my application. 回答1: Have you checked that you've enabled