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Questions tagged [cache]

A location or process for storing of transitory or temporary data in order to improve application or system performance.

1588 questions
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Find caching DNS server?

Is there any way to find out which servers, on the way on DNS routing, are caching records, and for how long? I'm on a iMac with Leopard. The reason I ask this, is that I've made some DNS changes to a domain name yesterday, and it's 30 hours later…
Ambidex
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Postfix connection cache / address verification probes

Is Postfix connection cache also applicable for address verification probes? My setup of 2 frontends with 1 backend sometimes runs into trouble under high load. Frontends verify recipients on the backend before accepting mail. Both positive and…
riha
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APC File Cache not working but user cache is fine

I have just got a VPS (with cPanel/WHM) to test what gains i could get in my application with using apc file cache AND user cache. So firstly I got the PHP 5.3 compiled in as a DSO (apache module). Then installed APC via PECL through SSH. (First I…
danishgoel
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Specialized cache for Nginx, one chache for all requests

I am using Nginx as my main webserver. I need to cache some special data, and I need the data from all requests to be stored in one cache and be retrieved from that cache. In each request, I will search the cache and if I found the data, I will make…
saeed
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Web server static resources not being cached by host

My web server has periodic spikes in bandwidth consumption: Logs revealed these are coming from a single user: (ip) - - [31/Aug/2011:20:55:31 -0400] "GET /train/16/32462 HTTP/1.1" 200 12909 (ip) - - [31/Aug/2011:20:55:32 -0400] "GET…
Ed Mazur
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Procedure for Setup of Internal Cache Server

I currently have a small business where many of the computers download the same fies over and over again (for example Windows Updates). What I'd like to do is setup a cache server, something that'll be inbetween my modem and Airport extreme, so that…
Dustin
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Linux Filesystem Cache using mounts

I have two servers s1 and s2 and two apps a1 and a2. a1 and a2 are installed on s1 and share some files that are accessible via a mount on s2. If a1 writes a file onto the s2 server and a2 the fetches this file from the remote s2 server, how does…
Franz Kafka
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SQL Server on VMWare - is transaction log corruption possible?

Scenario: SQL Server 2005 or 2008, Windows 2008 OS. Running in a VM hosted on VMWare ESX server. Is there any known issue with VMWare when it caches pass-through write request and it never reaches the disk, while SQL Server "thinks" that write…
demp
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Configuring NGINX for W3 Total Cache

I installed the W3 Total Cache plugin which automatically configured my nginx configuration file. Unfortunately, no CSS or other static files are showing up for me. Everything 404s except for the themeless homepage. This is the nginx configuration:…
Mike Rodi
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How do I make sure images to a Facebook iFrame are cached?

I have web hosting at MediaTemple. By default, is it likely to be set up to tell the browser to cache the images and other assets that are served? If not, how do I set up the caching? And then how would I be sure that it was working? Feel free to…
Nosredna
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Storing cached files so they are accessible by more than one server

I want to start using multiple front-end Apache servers for my website. At the moment I store various HTML files in a caching directory, e.g. "/htmlcache/homepage.html" Obviously I don't want to re-cache these files on a per-server basis, I'd rather…
Jon M
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Is dnsmasq a cache?

I have doubt whether dnsmasq is a DNS server or just a cache for DNS. I see in some of the linux machines that the dnsmasq is installed. Is it installed in default? Thanks in advance.
anand
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Can browser display images (or some other objects) from its cache without receive 304 status code?

i'm trying to understanding if is it possibile to avoid request for some embedded objects, loading them directly from cache without asking to web server if the object is valid or not (i don't wont web server response to me with 304 http status code)…
alesdario
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Install APC/eaccelerator and Memcached php-extensions on shared hosting

let's say I want to improve my application's performances.And I want to use an Opcode cache tool such as APC or eaccelerator and apply variable caching using Memcached. Let's say then I'm a beginner and I have built a working-app using the above…
luca
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Nginx caching strategy based on request

Lets say my backend takes a horrific 2 seconds to respond (out of our control say), and I never EVER want a visitor to experience this delay, we are not influenced by cookies or user session. What I want to do in nginx is something like this: server…
Mâtt Frëëman
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