caching

问题 We have been having a problem with Chrome caching a resource on our Glassfish server. The expires and no-cache headers are not being sent and the resource (an approximately 4 MB SWF file) is being cached by Chrome -- despite the presence of the Last-Modified header. Sometimes Chrome will get a 304 code, and other times it simply does a 200 (from cache). I understand the 304 -- Chrome is likely checking the most recent Last-Modified date with the cached version to decide. But other times it

问题 What is the difference between Cache and Translation LookAside Buffer [TLB] ? 回答1: From Wiki: In computer science, a cache (pronounced /kæʃ/, kash) is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive to fetch (owing to longer access time) or to compute, compared to the cost of reading the cache. In other words, a cache operates as a temporary storage area where frequently accessed data can be stored for rapid access.

问题 I have a jqgrid with data loading from an xml stream (handled by django 1.1.1): jQuery(document).ready(function(){ jQuery("#list").jqGrid({ url:'/downtime/list_xml/', datatype: 'xml', mtype: 'GET', postData:{site:1,date_start:document.getElementById('datepicker_start').value,date_end:document.getElementById('datepicker_end').value}, colNames:[...], colModel :[...], pager: '#pager', rowNum: 25, rowList:[10,25,50], viewrecords: true, height: 500, caption: 'Click on column headers to reorder' })

问题 I have the following columns using jqGrid (simplified) { name: "PMOPerson", index: "PMOPerson", width: 250, editable: true, edittype: "select", editoptions: { dataUrl: "/Person/GetSelectData" }, editrules: { required: false} }, { name: "HeadDisplayName", index: "HeadDisplayName", width: 150, editable: false }, when i go to edit a row by bringing up the edit dialog, it take 10 seconds for the PMOPerson dropdown to be populated. This is the case even after i have already loaded it once before

问题 Using spring-boot and its caching mechanism, is it possible to automatically store all entities returned as a collection into the cache one by one? For instance picture the following Repository method: @Query("...") List<Foo> findFooByBar(Bar bar); I'd like to insert these in a Spring Cache, one by one, meaning there would be N insertions (one for each element in the list) rather than just one (the whole list). Example: @Query("...") @CachePut(value = "foos", key = "result.each.id") List<Foo>

问题 How to remove Angular template cache once user clicks on logout? We did thorough research and tried to implement most of the solutions available out there. we tried following HTML Meta Tags <meta http-equiv="Cache-Control" content="no-cache" /> <meta http-equiv="Pragma" content="no-cache" /> <meta http-equiv="Expires" content="0" /> Server side res.setHeader('cache-control', 'no-cache', 'no-store', 'must-revalidate'); Javascript We tried to delete browser history as specified on this blog

问题 I have been reading about the four ways a cache can be addressed: Physically Indexed Physically Tagged (PIPT) Physically Indexed Virtually Tagged (PIVT) Virtually Indexed Physically Tagged (VIPT) Virtually Indexed Virtually Tagged (VIVT) Which of the following caches would suffer from the synonym and homonym issues? I know that the VIVT would suffer from these issues and PIPT won't. But what about PIVT and VIPT? 回答1: Since synonyms occur when different virtual addresses map to the same

问题 Is there any way to read the CPU cache contents? Architecture is for ARM. I m invalidating a range of addresses and then want to make sure whether it is invalidated or not. Although I can do read and write of the range of addresses with and without invalidating and checking the invalidation, I want to know whether it is possible to read the cache contents Thanks!! 回答1: ARM9 provides cache manipulation and test registers that allow you to examine the state of the cache. Here's a reasonable

问题 I converted a plain vanilla HTML page to HMTL5/CSS3 with a responsive layout, and for security reasons (dictated by the security people) the page must never cache. The page previously used <meta http-equiv="Pragma" content="no-cache"> and <meta http-equiv="Expires" content="-1"> to prevent the page from being cached. What replaces this in HTML5? How do you prevent an html page from caching in the client? I've spent a week reading about manifest files, but they seem to do exactly opposite of

问题 When answering this question (and having read this answer to a similar question), I thought that I knew how Python caches regexes. But then I thought I'd test it, comparing two scenarios: a single compilation of a simple regex, then 10 applications of that compiled regex. 10 applications of an uncompiled regex (where I would have expected slightly worse performance because the regex would have to be compiled once, then cached, and then looked up in the cache 9 times). However, the results