caching

问题 I'm facing an odd problem with my Leverage Browser Caching. In my .htaccess I use the following: ## EXPIRES CACHING ## <IfModule mod_expires.c> ExpiresActive On ExpiresByType image/jpg "access plus 1 year" ExpiresByType image/jpeg "access plus 1 year" ExpiresByType image/gif "access plus 1 year" ExpiresByType image/png "access plus 1 year" ExpiresByType text/css "access plus 1 month" ExpiresByType application/pdf "access plus 1 month" ExpiresByType text/x-javascript "access plus 1 month"

问题 I'm working on a vagrant machine (Homestead). In my Homestead.yml I have: sites: - map: myproject.local to: /home/vagrant/projects/myproject/web type: symfony I'm working with Symfony version 3.3 on PHP 7.1.2. The problem is when I try to execute the command php bin/console cache:clear I'm getting the following error: [Symfony\Component\Filesystem\Exception\IOException] Failed to remove directory "/home/vagrant/projects/vkfilestore-code/var/cache/de~/pools": . In my AppKernel.php I have:

问题 Background to question: I'm looking to implement a caching system for my website. Currently we're exploring memcache as a means of doing this. However, I am looking to see if something similar exists for SQL Server. I understand that MySQL has query cache which although is not distributed works as a sort of 'stop gap' measure. Is MySQL query cache equivalent to the buffer cache in SQL Server? So here are my questions: Is there a way to know is currently stored in the buffer cache? Follow up

问题 In a simple PHP caching (with ob_start and files), I need parts (more -or equal- than 3 per page) where don't caching (.PHP dynamic content or .PHP file context-user based). +-----------------+ | CACHING CONTENT | | | +-----------------+ | NO CACHING | +-----------------+ | CACHING CONTENT | +-----------------+ | NO CACHING | +-----------------+ | | | CACHING CONTENT | +-----------------+ In "no caching" parts I want include dynamic content. I can caching in three cached.html files (option 1)

问题 We have an entire table of entities that we need to load during a hibernate session and the only way I know to load all entities is through an HQL query: public <T> List<T> getAllEntities(final Class<T> entityClass) { if (null == entityClass) throw new IllegalArgumentException("entityClass can't be null"); List<T> list = castResultList(createQuery( "select e from " + entityClass.getSimpleName() + " e ").list()); return list; } We use EHcache for 2nd level caching. The problem is this gets

问题 In Symfony v3.2, I'm using a form with several EntityType fields, which have hundreds of options - and each option is a relatively big object. Since they don't change so often, I'd like to use some Cache in Symfony, to load them once and just keep feeding the EntityType with it. I've already cut down the size of the data that's feeding it, by pulling just the fields that I need, and then saved that into a cache. When I pull the data from cache - I cannot feed it directly to EntityType with a

问题 I've been trying to compare queries performance in neo4j. In order to make the queries more efficient, I added index, analysed the result using profile, and tried doing the same while using the USING INDEX. On most queries, DB Hits were much better using the second option (with the USING INDEX), rows were the same or less, but the time performance seems not to be reliable: on several queries adding the USING INDEX was slower though the better performance parameters (db hits & rows)and times

问题 A response from the server to a GET request has the following headers: HTTP/1.1 200 OK Content-Type: application/json; charset=utf-8 Pragma: no-cache Date: Thu, 08 Feb 2018 19:16:26 GMT Cache-Control: no-cache, no-store, must-revalidate Server: Microsoft-IIS/10.0 Content-Length: 801 Expires: -1 Content-Encoding: deflate X-Powered-By: ASP.NET X-AspNet-Version: 4.0.30319 X-AspNetMvc-Version: 5.2 Now 4 seconds later the browser (macOS Safari 11.0.3) makes the same request. The developer consoles

问题 A rest endpoint that download a generated pdf file, where the response headers set are: Cache-Control = public, max-age=600 Content-Disposition = attachment; filename=one.pdf (also content-length, pragma, content-type = application/pdf are set) In IE 11 and latest firefox the browser caching works(i.e I can see the pdf url in firefox cache - about:cache). I also checked that server is not hit for the time specified at max-age. In chrome I can find the pdf url in cache - chrome://cache, only

问题 A rest endpoint that download a generated pdf file, where the response headers set are: Cache-Control = public, max-age=600 Content-Disposition = attachment; filename=one.pdf (also content-length, pragma, content-type = application/pdf are set) In IE 11 and latest firefox the browser caching works(i.e I can see the pdf url in firefox cache - about:cache). I also checked that server is not hit for the time specified at max-age. In chrome I can find the pdf url in cache - chrome://cache, only