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

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-1
votes
1answer
34 views

Chrome not accepting HTTP/2 Pushed Content

I've been toying with HTTP/2 Server Push using Apache 2.4.20 on Ubuntu 14.04. For some basic examples, like pushing an image to a test webpage with only raw html and 2 img tags, it works great, the ...
1
vote
1answer
22 views

How to keep outlook from creating multiple ost files in exchange cache mode

I am implementing Office 365 on my domain. I have group policy setup to allow for exchanged cache mode and the .ost files are stored on a remote server. The issue i am having is that each terminal ...
3
votes
1answer
1k views

Linux ZFS does not buffer writes to write buffer (SLOG/ZIL)?

When experiencing write I/O, the log column in zpool iostat -v does not show any ZIL activity, ever. This results in higher than expected wait times when writing data to disk (sometimes over 80ms ...
0
votes
1answer
2k views

Nginx ignore query string for caching certain files

I know my setup is a bit crazy, but whatever.... I set up Nginx on Openshift to cache map tiles (for a map viewer, you can guess the purpose, :-) ) that are served from my home network, which has ...
0
votes
0answers
13 views

Backup Drives: Should I prefer more cache or a SAS interface?

Background: I am buying new drives for a backup server. I've found a good price on a WD RE drive that has a SAS interface but only 32MB of cache. I have to pay $40 more to get a SATA interface and ...
1
vote
2answers
193 views

bind9; how to automatically refresh entry after entry expires

I am looking for a way to automatically refresh entries in my cache if it expires. For example, example.com has a TTL of 60, i would like to automatically refresh it if it expires so that when users ...
0
votes
0answers
9 views

CIFS metadata caching?

I know my client is the only one reading and writing a certain SMB share. What can I do beyond cache=loose to enforce caching metadata? I have no control over the server. There's a certain directory ...
0
votes
1answer
45 views

Amazon Web Server EC2 - changes don't seem to stick

We have a Wordpress site hosted on an Amazon Web Services EC2 instance using elastic load balancing. I'm running into a frustrating problem where it seems like every time I refresh the browser, ...
2
votes
1answer
20 views

DNS - Difference between scavenge and clear cache?

Server 2012 R2, DNS Service: In DNS Manager, what is the functional difference between "Scavenge Stale Resource Records" and "Clear Cache."?
0
votes
0answers
4 views

Fastcgi cache for ajax/restful based application?

Actually, we are using AngularJS with alot of cacheable REST http call. Also, there are dynamic pages that are not ajax based. Since mysql caching is quite good. I wonder if applying Fastcgi cache ...
4
votes
1answer
4k views

Error headers: ap_headers_output_filter() after putting cache header in htaccess file

Receiving error: [debug] mod_headers.c(663): headers: ap_headers_output_filter() after I included this within the htaccess file: # 6 DAYS <FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$"...
0
votes
1answer
24 views

Old file is being downloaded from web server when browsing from LAN

I am facing a new strange problem while downloading files from web server. I am using windows server 2012. I will explain the problem with example. I have a text file (update.txt) in my server, to ...
0
votes
3answers
3k 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
16 views

Squid caching issues

I'd like to create a cron job that will delete our squid cache and restart it. The reason I'm doing this is because when I upload a new build javascript code to our webserver, when I browse our app in ...
2
votes
0answers
441 views

400 bad request from a proxy cache

So we have an nginx proxy cache that is used to maintain uptime even if npm goes down. On occasion this server (noticeably once every few months) starts returning 400 bad request for every response ...
0
votes
1answer
1k views

How to detect if this is an ISP/Server cache?

Before we start: I'm a noob. I'm trying to access YQL to get some information. Grabbing it using PHP's file_get_contents is simple enough, but it seems like either the client's ISP or the server is ...
1
vote
1answer
46 views

Varnish not working with last-modified

I'm new to Varnish and to reverse proxies in general. I'm testing Varnish in an application that works like a blog where I have a page with an "updated_at" that changes once the page is updated. As a ...
0
votes
1answer
13 views

is nginx caching working?

I can't tell if nginx is caching properly. I am running a MEAN stack app with nginx in front as a (hopefully) caching reverse proxy. If I use the chrome dev tools networking tab, it has a response ...
3
votes
1answer
27 views

bind9 does not resolve dnssec correctly

I have a problem with my dns server setup. My bind server is mainly a cache-server but does also serve some internal domains. It listens only on my private network and serves only requests from there. ...
3
votes
1answer
1k views

nginx - serving stale cache response while updating

In nginx I am using the proxy_cache_use_stale updating directive (http://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_cache_use_stale) so that concurrent request to an invalidated cached ...
0
votes
0answers
9 views

Nginx proxy_cache security for meteor apps

I have a meteor app running multiple instances and use nginx as a load balancer. I would like to make use of the proxy_cache directive so that meteor will only handle the ddp traffic and all html, CS ...
4
votes
1answer
1k views

Nginx, memcached and cakephp: memcached module always misses cache

I've got a simple nginx configuration; server{ servername localhost; root /var/www/webroot; location / { set_md5 $memcached_key $uri; index index.php index.html; try_files $uri $...
0
votes
2answers
2k views

Nginx configuration for caching static files

I have some problem on configuring Nginx to correctly serve an AngularJS application. The server is configured as follow: www.example.com we have the landing page of the application www.example.com/...
-2
votes
0answers
14 views

Cahce a page in Apache

I need help with how to cache a page that have the string "Cache-Control: public" in the header. I do not see any specific directive in the documentation on how to do this. I am thinking I have to ...
0
votes
1answer
32 views

Setting a different cache header per site-section in nginx

For different website sections we use different caching headers. For example: the /wp-admin section shouldn't be cached at all, and the /blog section only for 4 hours instead of the default 2 days. ...
0
votes
0answers
27 views

Microcaching with nginx reverse proxy for gunicorn upstream webserver (Django application)

I need help in setting up a microcaching config for my nginx reverse proxy server. I have rudimentary webserver knowledge - enough to get me started on a vanilla setup (with quite a few missteps!). So ...
0
votes
1answer
1k views

Mod_cache is not logging or caching

Apache 2.2 on RedHat 6.3. I have a virtual host that is setup like so: <VirtualHost xxx.xxx.xxx.xxx:80> ServerAdmin some@email.com DocumentRoot /home/xxxxx/Sites/xxxxxxx.com/htdocs ServerName ...
0
votes
1answer
3k views

Update Cache-Control max-age when srcache returns response from cache

I have configured Nginx to use srcache (along with the redis and redis2 modules). Server-side caching works great. My application responds with the appropriate Expires and Cache-Control headers, and ...
2
votes
2answers
1k views

How to Create Yum Cache Server for client machines in LAN

Like in Ubuntu we have the option of creating "Ubuntu update cache server" which downloads and update packages directly from internet and serves other client ubuntu machines for installing/updating ...
0
votes
0answers
19 views

Caching system on each host on a local network to improve file access

I'm in a team where we work on different projects located on a file server. Each project is in a specific folder. Here the network architecture we use today: The problem is that some person are ...
0
votes
0answers
16 views

Apache: browser caching not working

I'm trying to use mod_expires and mod_headers to enable browser caching for my site. I have this in my VirtualHost: <FilesMatch ".(gif|jpg|jpeg|png|ico|swf|js|css|pdf)$"> ...
1
vote
1answer
2k views

VCL - configuration for Magento and Varnish 3.0.2

I would like to kindly ask if there's someone who can help me configure Varnish for Magento to reach far more hits. My current ratio from varnishstat is: cache_hit=271 cache_miss=926 I'm kindly ...
0
votes
2answers
46 views

Handling caching with NGINX when cookies are being set by the server

I've had very good performance results using NGINX microcaching. However, I'm still not sure how to best handle server responses that have the Set-Cookie header. Can responses from the origin ...
6
votes
6answers
8k views

Slow Memcached: Average 10ms memcached `get`

We're using Newrelic to measure our Python/Django application performance. Newrelic is reporting that across our system "Memcached" is taking an average of 12ms to respond to commands. Drilling down ...
-1
votes
1answer
51 views

The cpu L1/L2/L3 cache see in kvm guest is really matter?

[root@centos7 opt]# cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) [root@centos7 opt]# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: ...
4
votes
2answers
3k views

CloudFront with Custom Origin and ELB

We are using CloudFront for our static assets but also wanted to allow for Gzip. We set up a new distribution with a custom origin pointing back to our application servers which are behind a elastic ...
0
votes
0answers
35 views

NGINX rewrite dynamic url

I configure NGINX proxy cache for Atlassian Confluence And i faced a problem of caching the edited pages Some time after editing the pages do not show the changes(cache TTL) I decided to force the ...
0
votes
1answer
37 views

nginx Rewrite for CImage Cache

I'm setting up a script (http://dbwebb.se/opensource/cimage) to do some image processing and I'd like to cache the resulting image output. I have that part working fine. The problem I'm running into ...
0
votes
0answers
20 views

Magento Varnish cache warming with https (i.e. ssl)

I'm running Magento 1.9 on Ubuntu 14.04.4 x64, with a NGINX -> Varnish -> Apache setup and am using SSL everywhere. Everything works fine except when I try to warm the cache. I'm using the ...
1
vote
0answers
20 views

On multiple request to Squid, send a single request to a backend and queue other requests on miss

I would like to protect a backend server by having Squid send a single request to a the server when there is a cache miss for a resource. During the fetching, other requests should be put on hold ...
0
votes
0answers
120 views

nginx proxy cache mp4 streaming

Sorry for my question, the schema like this: there are upstream which is a IIS server where locates video files. my nginx is an proxy caching server, I need to cache mp4 file when client starts ...
1
vote
1answer
59 views

How do I reduce server load for a dormant WordPress site using W3 Total Cache?

My current host who did all performance optimization for me has jacked up their price to $1,000/month, so I was forced to move to a new host. The new host charges only $150/month. They give you W3 ...
1
vote
0answers
16 views

BIND cache dump file format parsing

I'm trying to analyze the contents of BIND's cache by looking into dump files, the ones generated by rndc dumpdb -cachedb. ; ; Start view _default ; ; ; Cache dump of view '_default' (cache _default) ...
0
votes
0answers
39 views

Nginx reverse proxy with two caches and one origin (OPENWRT)

I have two raspberry pi and one origin server. Both rasp can communicate between them in an ad-hoc network. Both rasp have also another radio for clients/consumers join in AP mode. I got this nginx....
1
vote
1answer
46 views

Inconsistent cache and expires headers (pragma:nocache)

I was trying to get my Apache Server (v2.4.7) to respond to an If-Modified-Since header sent by browsers and spiders like Google. I found this on a recommendation on Google Webmaster. I never knew ...
2
votes
1answer
44 views

possible to see remaining DNS negative cache for domain?

For normal DNS lookups, one can use Dig to get an answer including the remaining TTL for a DNS record. If that answer is from a cache, the TTL will "count down" until the next authoritative query, and ...
-1
votes
1answer
77 views

What's the best way to cache a website on nginx server with SSL?

I have a wordpress blog which runs using nginx (SSL) + PHP-FPM + MySQL. I wondered what was the best way to cache this kind of site. I heard that Pound and Varnish do that well, but I haven't found ...
0
votes
0answers
191 views

Magento2 Varnish + Nginx (SSL not caching)

I move the question on serverfault instead of Magento (https://magento.stackexchange.com/questions/117075/m2-varnish-nginx-ssl-not-caching) since I consider this topic more on server side ...
1
vote
1answer
31 views

Varnish Purge - Hard Refresh on Browser

We're using varnish to proxy/cache content on 2 web servers running drupal. With that said, everything seems to be up and in order, pages are being cached, drupal is able to make the purge request and ...
1
vote
1answer
2k views

Varnish stops listening on port 80 after few hours

I have configured varnish to listen on port 80 and nginx to listen on 8080. After around 24 hours of uptime, my site has been down for 22 hours. I checked in and found varnish isn't listening on port ...