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

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190 views

Caching Docker (Cloudfront) images with Squid

I have a Squid server setup with ssl-bump caching SSL resources used by Docker but I'm having issues trying to get it to cache requests to Cloudfront, for example: 1415056176.733 190419 172.17.0.40 ...
0
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0answers
72 views

First steps in distributed cache and application

Background: We provide a client with a single server to which we provide a data dashboard site (ASP.NET/IIS7) feeding multiple MSSQL databases (OS: Windows Server 2012 / SQL: MSSQL 2008R2). One of the ...
0
votes
1answer
1k views

Nginx not processing proxy hide header and proxy ignore headers

I have trouble trying to make Nginx ignore and hide some headers from a proxied server. I want Nginx to hide and ignore "Cache Control" and "Server" headers but it didn't work, I don't know why. My ...
0
votes
1answer
379 views

Nginx: using X-Accel-Expires with Cache-Control

I'm using Nginx as a caching proxy server. I have problems with caching responses using both X-Accel-Expires and Cache-Control headers. My upstream returns some request body with headers to nginx: ...
-1
votes
3answers
10k views

How to flush DNS resolver cache on Linux (and FreeBSD)

I am admin for several Linux and FreeBSD servers and here is a problem I have: The servers run a tool that does a lot of DNS queries every minute for the entire network. When it does a query, the ...
-1
votes
1answer
105 views

Web caching to reduce bandwidth on low speed connections [closed]

On my company we have an ISA Server proxy we use to access internet, this server is managed by external administrators and we do not have access to modify its configurations. Lately we have been ...
2
votes
2answers
291 views

Solaris 10 ZFS ARC Maxed Out and CPU's Overloaded

We've been running ZFS for a couple years now on Solaris 10 on Oracle M5000 Enterprise server with 32 CPU cores and 256GB of memory. We are running a database/application on this server which appears ...
-1
votes
1answer
144 views

Varnish with PHP FastCGI / Change FastCGI server port

I want to run Magento with Varnish Cache. So far my PHP runs as FastCGI. I am now trying to set up Varnish. And have a probably pretty stupid question. So as I understand Varnish will listen on port ...
4
votes
1answer
205 views

Is this a case of a stale ISP DNS cache or did I fudge something up?

I am currently in the process of transferring a legacy website (from a legacy hosting service provider) to a modern solution. Due to my context-specific requirements (which include financial ...
1
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0answers
79 views

How cache OpenLDAP Meta database (for use with Websphere Application Server)?

I have configured Meta database directory on OpenLDAP server for two different Active Diretories and it's work. But now I'd like set cache for this OpenLDAP, but I don't know how. From my slapd.conf ...
1
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0answers
67 views

Does OPcache work when PHP is running in CGI mode?

Does PHP 5.5s OPcache work with PHP running in CGI mode? Or does that even make sense, since it forks and kills PHP for each request?
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votes
1answer
173 views

Debug Nginx caching

I want to determine when I am getting cache hits or misses. Preferably, this would be a header, like X-Cache: HIT or X-Cache: MISS How can I do this with Nginx (a reverse proxy for the upstream ...
-1
votes
1answer
89 views

Does Nginx respect maxage from upstream server?

I see the proxy_cache_valid directive, but that confuses me. In HTTP, doesn't the upstream server specify this with Cache-Control and maxage? How do I get Nginx's cache to use maxage ?
1
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0answers
89 views

Enabling APC cache takes down website

I have a VPS running on centos 5 with 2 GB ram. I run a IP.Board forum on that server. Recently my server was hacked and I had to format the disk and start again. I was using APC cache before and it ...
0
votes
0answers
26 views

Unexplained hostname on IIS on Test Server

The test environment is IIS/Windows Server 2008/ColdFusion10 My development environment is Apache2/Ubuntu14/ColdFusion10 Other developer uses ONLY IP Address to test the hosted website on the ...
1
vote
1answer
2k views

Nginx not caching data

I have a REST API behind an nginx proxy. Proxying works fine, however I am unable to cache any responses. Any help would be much appreciated: Nginx config: worker_processes 10; error_log ...
4
votes
2answers
913 views

Why does Apache send 200 OK while Last-modified matches If-modified-since?

I'm trying to have a basic behavior regarding my caching strategy: files should be cached, and revalidated with server each time. So I would like Apache to send a 304 back. Here is the dialog that ...
0
votes
1answer
104 views

Memory cache is full not sure what is using it and if it is normal [duplicate]

The situation is that amazon bots are download ~600k images off my server. My web app deployed on apache server is extremely slow probably because ram usage is 100% some statistics: ...
0
votes
1answer
28 views

Varnish 3 ignore the req.backend directive

Varnish3 is ignoring the req.backend directive. As explained on the documentation (here), I've set two backends, and the regex for redirecting the request to the correct one. By the way, seems liks ...
0
votes
1answer
126 views

Varnish cache with NGINX files not updating WordPress

It seems that Varnish is missing or not validating cache properly. When I try and purge my cache, I get 200 OK Cache successfully cleared, but my page does not update. I am simply making HTML changes ...
1
vote
1answer
54 views

Memcached Pool - Outtage causes increased lag in response time

I have multiple cache servers which are added to a virtual pool at the PHP layer via the Memcached::addServers() api. During fault tolerance testing I noticed that taking one of the memcached servers ...
1
vote
1answer
111 views

Varnish does not purge my requests sent by Plone

I have varnish 3.0.5 up and running, connecting to a Plone 4 backend. My requests are cached, but not purged reliably, actually only after expiration of the ttl. plone.app.caching is the addon, which ...
0
votes
1answer
105 views

How to read apache header in NGINX?

I've set up nginx to bypass ajax requests (wich have header): set $accel "0"; if ($http_x_requested_with) { set $accel "1"; } proxy_cache_bypass $accel; It works fine, but I want be able ...
0
votes
0answers
101 views

How can I configure Apache so clients cache images but still check for updates?

I'd like to set up an Apache vhost such that browsers will cache images locally but will check back against the server for updates each time prior to displaying images. I have this currently: ...
1
vote
1answer
7k views

why adding Expire-Header to static files in nginX does not work

I have a single server block where my site resides in. Inside of that block I've added a location block as below: server { ... location ~* \.(?:ico|css|js|gif|jpe?g|png)$ { expires 30d; ...
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0answers
57 views

IIS static content - how can I cache just on file modified date?

How Can I get IIS 7.5 to cache on the files modified date only for static content files (e.g .html). It seems the only options that are available is no-cache, or expire at arbitrary times. I need ...
0
votes
2answers
391 views

How do we find out what is causing high cache usage on our server?

Every Friday from about 22:00 our server starts using large amounts of cache and then dies about two hours later. Please look at the following Cacti graph. We tried hunting processes which use ...
0
votes
1answer
22 views

What does 'cache-control' do for a page, not a static file? [closed]

When I set a value for 'cache-control' for a page, does my browser cache the whole page just like js or css? I've set 'Cache-Control:max-age=2592000, public' and monitored apache access logs. It ...
1
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0answers
49 views

Solr 4.5, timeouts on cold cache, how to keep it warm?

(not sure if that is more StackOverflow kind of question so pardon me if it is) There is an fairly large index of about 70M documents roughly 30Gb in size running on Solr 4.5. While it is fine with ...
0
votes
0answers
48 views

How to cache particular file in folder using .htaccess

i tried google and found one solution at 'http://webmasters.stackexchange.com/questions/24881/cache-a-particular-image-using-htaccess' but it cache all the file of folder, i want to cache only ...
0
votes
1answer
118 views

nginx: how to cache negative FastCGI responses only

Need some collective brainstorming :). There is a heavy PHP application (e.g. Magento) and each time a visitor hits a non-existent page (or there is a problem with a particular part of the ...
2
votes
1answer
163 views

Memcached cachesize 512M or 1G for VPS 2G? [closed]

I just started to use memcached on a VPS with 2Go of RAM. I set the cache size at 512 Mb, but I am wondering if I can go for 1024Mb. On the VPS there are: a local business website with very few ...
0
votes
1answer
212 views

djbdns/dbndns dnscache query ipv6-only nameservers?

I have (attempted to) set up dnscache on Ubuntu 14.04 (Trusty) to do dual stack for servicing requests AND querying authoritative name servers. To be clear, I'm using the dbndns package, which has ...
2
votes
1answer
577 views

IIS Output Cache vs ASP.NET Output Cache

Quote from iis.net: The ASP.NET page output cache is separate from the IIS 7 output cache. In applications that use the Integrated ASP.NET mode, the ASP.NET page output cache can be used ...
0
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0answers
24 views

Moved site from IIS6 to IIS7.5 - caching confusion

I have moved an old ASP.net (net v3.5) from Win2003 to Win2008R2 with IIS7.5 The old site has a huge long list of cached ISAPI extensions. Output caching is enabled on IIS7.5. Do I need to add the ...
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votes
1answer
489 views

Nginx CSS Caching [duplicate]

I've been trying to fix this for a while, but I haven't been able to find a solution. Some notes about my setup: I am not using VirtualBox I am running Nginx 1.4.6 Ubuntu The CSS's cache will not ...
1
vote
2answers
234 views

Wrong DNS answer with CNAME and A Record at the same time

We had a customer which has set a CNAME Record for his domain. Somehow he managed it to set an A Record too, which should be not possible and is forbidden by DNS. But the result was: $ dig ...
0
votes
0answers
50 views

IIS cache headers for selective file types

I have an application that serves .js, .css and .gif, and bunch others (.xls, .htm,.pdf....etc) file types. My requirement is to allow browser caching of .js, .css and .gif files but not allow any ...
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votes
2answers
43 views

Will Varnish recreate cache?

I want to cache pages on my nginx site for fast retrieval. Let's say every 5 hours I want to expire all the cache and have it recreated. Will Varnish make calls to the web-server and recreate cache on ...
1
vote
0answers
57 views

Rail's FileStore with Linux Disk Caching or RAMdisk?

I have a Ruby on Rails application that stores it's catched files on the filesystem (Rails file-system cache). I was thinking about changing to memcached Store, but a short test shows it isn't a big ...
0
votes
0answers
36 views

How to set varnish cache purge time

I want to set the varnish cache purge time to 1 hour. I was not able to find in .vcl files. Is it set via some system variables or needs to set somewhere else.
2
votes
2answers
137 views

After ntpdate update for ubuntu server I always receive the old php file in nginx

The problem with nginX caching happened when I used ntpdate ntp.ubuntu.com to sync my server clock. Now when I request the path http://www.example.com/project/create I receive the old PHP file that ...
1
vote
1answer
196 views

What is the difference between proxy_cache_ and fastcgi_cache?

I was searching for a simple Nginx microcache solution and I end up seeing two ways to have microcache. Some tutorials use proxy_cache, while others fastcgi_cache. What are the differences, pros and ...
1
vote
1answer
165 views

What happens to a random bit error in the cache on an Intel CPU?

I have a system with ECC RAM and a Xeon E3 CPU. My understanding is that ECC circuits on the RAM will detect corruption from random bit errors in the RAM chips. But what happens to random bit errors ...
0
votes
0answers
204 views

CouchBase Client Fails to Cache Object less than 20mb. Time Out Error

I am caching my serialized POJO s(4mb-8mb size objects) concurrently into Couchbase server with CouchBase client (couchbase-client-1.4.3). for(upto 20 itertarions){ new Thread().start().. ...
0
votes
3answers
1k views

Varnish doesn't seems to be doing anything

I would highly appreciate an input on whats going wrong here: Running Magento on Ubuntu 14.04 x64 + Nginx + Mysql + Php5-FPM Please double check my steps so maybe you could help me point what's ...
0
votes
1answer
1k views

How to clear cache in centos remote server? [duplicate]

I had been trying to clear cache in a remote server and I got these commands. First login as root user and execute: [root@server ~]# sync [root@server ~]# echo 3 > /proc/sys/vm/drop_caches bash: ...
3
votes
1answer
241 views

Caching DNS server returns invalid ip address for external lookups

I'm trying to resolve a DNS issue and am running short of ideas. Google doesn't seem to be helping, either. When I use my local caching name server to resolve external host names, it always returns ...
1
vote
1answer
116 views

apache expires not working for pyramid server

I have a pyramid server running on EC2 via apache with following configuration - <Directory path_to_virtual_env> WSGIProcessGroup pyramid Require all granted Order allow,deny ...
2
votes
2answers
212 views

Memory used by unknown processes on OEL6 - without cache and slabcache

I've searched through "Where is my Linux memory?" questions, but I couldn't find a similar scenario for my kind of leak: OEL 6.3 x86_64 Linux with 6GB of RAM without any of my main components ...