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

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31 views

Mirrored cache server on an EC2 Cluster?

I have EC2 instances serving up a non-intensive, relatively low traffic website, and rather than shelling out for ElasticCache I was thinking of doing the caching on each server and mirroring the data ...
0
votes
1answer
17 views

Caching (memcache/redis) and multiple servers - best strategy

We're considering best strategy for using cache (memcache or redis based) in our application (Symfony2). It will be deployed on multiple (so far 3) separate machines with load balancing and separate ...
-1
votes
1answer
26 views

Transparent caching solution

I would like to in some cases make transparent caching for certain sites. Let's say that I have a static list of site from where I want to cache all downloads, ie: the client wants to download ...
1
vote
1answer
13 views

Query cache for MariaDB Galera cluster

I've read from multiple sources now that you can't have query caches with Galera, but my current application could really benefit from a query cache. I'm load-balancing this cluster with HAProxy and ...
3
votes
1answer
34 views

iozone: 5 concurrent threads random read of 300K blocks does more ops/s than using only one thread, what could be the underlying reason?

The partition is in RAID1 using software RAID. Command line used: iozone -s 190g -r 300k -O -b test_file OPS Mode. Output is in operations per second. ...
2
votes
1answer
63 views

Taking pressure off a storage server using a cache server? [closed]

In our small business we process large amounts of print-quality ads, and our graphics departments read/write directly to our storage server (Lenovo px4-300d); but after a series of issues it's coming ...
0
votes
1answer
22 views

HTTPS to HTTP - Response appears cached, or maybe this doesn't work.

Long story short: Google cached https:// links, when this website doesn't need an SSL - The SSL is expired now, and people are getting that warning screen when coming from Google. Thus, we found ...
-1
votes
3answers
29 views

Linux makes cache for swap. what for?

It looks like joke: swapfile on "ramdysk" in 64bits system? I look into file: /proc/meminfo and made some investigation. Look for line: SwapCached: nnnnn kB . One is what I don't understand. ...
0
votes
0answers
13 views

issues symfony2 deployment with cache [duplicate]

Situation: I put a website perfectly working locally on my deployment machine. this machine is a mutualized server at OVH. Once online, I set parameters, set right permissions, etc... Issue: After ...
0
votes
1answer
24 views

htcacheclean doesn't seem to be cleaning the cache

I'm running mod_cache with apache 2 on a fairly high traffic'd site. I've set the htcacheclean to run in demon mode every 10 minutes to keep the cache at 4GB. It's currently at 15GB and doesn't seem ...
0
votes
0answers
21 views

Force end user browser to forget old SSL - Caching & Secure Pages

Problem I recently switched the domain of my website. websiteA.com to websiteB.com (Stack: LEMP, running memcache and Varnish for caching.) I set up nginx to 403 re-direct everything and on new ...
0
votes
0answers
26 views

Nginx cache shared between multiple servers

We have 8 REST-ish API servers with Nginx using FastCGI with PHP-FPM to handle requests. We're currently using Nginx' FastCGI caching (directives like fastcgi_cache_path). This means that API ...
2
votes
0answers
20 views

How to enable disk cache again after enabling iSCSI in Windows Server 2012?

I create an iSCSI Virtual Disk and a corresponding target. This enables the cache bypass flag on the volume. After I remove the iSCSI disk, the flag doesn't get reset. Anyone can help me to reset ...
0
votes
1answer
70 views

How to make an existing caching Nginx proxy use another proxy to bypass a firewall?

My question is about using Nginx as a proxy behind another proxy. (Somewhat confusing.) I want to set up Nginx so it acts as a caching proxy server to an npm mirror. Here is the link: ...
1
vote
0answers
38 views

DNS/Server change causing blank page

We have recently changed servers and hosts of our test|production environment. Right now we are still testing but our http://test.example.com, is sometimes showing just a blank page to certain users. ...
-1
votes
0answers
14 views

Cache static content with subdomain, IIS

I have set up subdomains for images. Now when I do web page speed tests I get "complaints" about not having Cache static content for images. I have the Application pool set to no handle and the site ...
0
votes
2answers
41 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
23 views

nginx wont cache images when they are read through php files

i have .php file wich is loading images to hide their location. Every images are correctly caching through this directive: location ^~ \.(jpg|jpeg|png|gif|ico|css|js)$ { expires max; ...
4
votes
1answer
98 views

Linux; What is stripe_cache_size and what does it do?

I am currently building a software RAID under Linux using mdadm utility and I've read a few articles that describe how to increase the stripe_cache_size value for that RAID and how to calculate an ...
1
vote
2answers
19 views

When I try to cache with nginx I get 404 on resources

I googled around and found some scripts on how to cache static resources on nginx, the problem is that when I apply these scripts I get 404 on my scripts and styles. What am I doing wrong here? I'm ...
2
votes
2answers
72 views

linux caches route with IPs of machine it has no access to

I have a VPN with a gateway, and an application server. The app server only knows about the gateway of the VPN. The gateway of the VPN knows about the gateway of the physical network the vms are ...
0
votes
0answers
27 views

How to prioritize Squid Cache Delay Pools

So I have the following squid cache delay pool configurations: # DELAYS delay_pools 2 delay_class 1 1 delay_class 2 1 delay_access 1 allow parents delay_access 1 deny all ...
0
votes
1answer
17 views

How can I speed up the opcode cache response time?

I've got a moderately powerful VPS (quad core Xeon, 3GB ram, ssd) running Ubuntu 12.10, PHP 5.5.8 and Opcode cache is enabled. I'm using memcached, opcode cache and mod_pageSpeed. I'm monitoring the ...
0
votes
0answers
16 views

Setup nginx to return last cached item, then update cache via proxy_cache and proxy_cache_use_stale

I am trying to setup nginx in front of a service with a significant load/warm-up time. I would like to setup the proxy_cache so that the last cached value will be returned immediately and nginx will ...
1
vote
3answers
59 views

Varnish Cache: How does Varnish play with other caching systems?

I'm considering installing Varnish cache in front of my forum platform to speed it up even further. It already runs Percona MySQL DB, PHP 5.5.8 (which has Opcode caching built in, and running) and ...
0
votes
0answers
24 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
161 views

Nginx + php-fpm + Zend Opcache + php 5.3.10 - Dynamic Generated CSS|JS

I have the Zend Opcache pecl extension working almost completely- except for that I have 4 files that technically are content-types of css and js - but are "php" files and get sent through fastcgi and ...
2
votes
2answers
393 views

Nginx + php-fpm - Each php-fpm process 70-100% cpu when running

I have a situation in which the following is taking place: We are on linode with 8-core, 8gb of ram , 2.6 ghz - using nginx + php-fpm - we are getting extremely high graphs of cpu usage (which we ...
0
votes
1answer
45 views

Set Up Apache as a Forward Proxy with Caching

I would like to configure apache forward proxy with caching. I have some clients that have to downloa some big files from time to time from the internets, and I would like it to be done through this ...
2
votes
2answers
36 views

File Caching Proxy Server For Config Management Software (Chef)

I have several servers that I manage with Chef. They all belong to one network and bandwidth among them is big in contrast to bandwidth to outer internet. The problem is: many times there is a need ...
0
votes
0answers
16 views

Nginx + W3 Total Cache not working

I have a Ubuntu 12.10 x64 server running Nginx + MySQL, i've installed everything and my wordpress site is perfect. But, at the moment i installed W3 Total Cache, i got an error from Minify which ...
1
vote
2answers
51 views

What happens to DNS cache server when the zone DNS server fails?

I have DNS server running which caches for records from a main DNS server. What would happen when the main DNS server is down? Will the cache DNS server still serve the records it has or will all the ...
0
votes
2answers
48 views

How to benchmark maxCache 3.0 with SSDs? [duplicate]

We're a software development company and previously outsourced the HW side of business but now we're looking into building our own private cloud. We recently purchased a few servers, one of which is ...
1
vote
0answers
25 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 ...
0
votes
0answers
34 views

Where do I put the CacheEnable, CacheRoot directives in httpd.conf? Not working currently

I am not using a VirtualHost and I added the following to httpd.conf right after the DocumentRoot declaration (not the one that's an XML node): CacheEnable disk / CacheRoot /var/www/cache ...
-1
votes
1answer
54 views

How to test is hardware ssd-cache work?

We have server with hardware raid controller (Adaptec ASR71605Q). It has 10 sas HDD, 2 SSD for cache and 1gb onboard cache ram. On server installed ESXi. On ESXi I'm start Linux, create 2Tb disk for ...
0
votes
2answers
95 views

How do I set nginx's cache files to file permissions 777?

I'm trying to write a process that invalidates the cache on nginx (and doesn't re-warm the cache). By default, nginx has 700 on its cache files. The closest setting that I could find was: ...
0
votes
1answer
92 views

Cent OS - MySQL Daemon failed to start [closed]

I'm running AWS micro instance with 0.615 GB Memory. I have APC running on it with 35 MB size max as default. Now I have restarted mysqld and it wont start. It has just stopped. I really need to get ...
0
votes
2answers
130 views

nginx: fastcgi_cache_path empty

I wanted to try fastcgi_cache on my nginx 1.5.8 setup as shown here. In nginx conf, http section, I added: fastcgi_cache_path /var/cache/nginx levels=1:2 keys_zone=microcache:10m max_size=1000m ...
0
votes
1answer
46 views

nginx cache gzip file's to temp directory?

Is the following possible through Nginx: I now have gzip on; but the server needs to compress the popular files everytime, the files are xml files created through a database, but they are "static". ...
2
votes
0answers
65 views

Nginx not honoring must-revalidate

I want to use nginx as a caching reverse proxy. I also have a special requirement, which I thought could be accomplished with nginx. I am using Amazon s3 as origin server and I use signed urls to ...
0
votes
0answers
171 views

Nginx does not cache json

I have the following nginx configuration user nginx; worker_processes 10; pid /var/run/nginx.pid; events { worker_connections 1000; } http { sendfile on; tcp_nopush on; tcp_nodelay ...
1
vote
1answer
118 views

varnish file download fail from user session

I have 2 varnish 3.0.4 servers on edge of an Apache cluster (fallback director). On one of my sites, users log in to download static content such as pdf, images (jpg,jpeg,png, gif), xls/xlsx etc. All ...
1
vote
0answers
44 views

Setup transparent proxy for cache Windows SBS 2008 [closed]

We have a server in our little local computer repair shop and I would like to get it working as a transparent proxy to cache downloads (repeated files such as windows updates and large files like ...
3
votes
0answers
43 views

Why doesn't Android cache Apple Touch Icons? [closed]

I'm not sure if this applies to every Android phone, but it seems that many Android browsers don't cache the Apple Touch Icon and reload it on every page view. I have the following in the ...
0
votes
1answer
155 views

Linux empty buffer cache command permission denied

I'm using the following commands to flush cache: # sync; echo 3 > /proc/sys/vm/drop_caches # sync; echo 2 > /proc/sys/vm/drop_caches # sync; echo 1 > /proc/sys/vm/drop_caches When I use ...
2
votes
1answer
78 views

squid doesn't cache anything at all

I have configured squid for anonymous search and cache proxy. Initially it was working well, after two weeks it becomes slow(loading web page become slow) then again I had to looked into squid. I saw ...
0
votes
0answers
32 views

Clear NGINX cache using FTP

I have an NGINX server set-up to handle caching for a website (running elsewhere). Works like a charm, however we want to administrators to have an option to flush the cache from their backoffice. I ...
2
votes
1answer
48 views

What strategy should I use for Apache HTTP Server so that newly deployed files have their cache invalidated?

A very common solution is to do the following: <ifModule mod_headers.c> FileETag None Header unset ETag Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate" ...
1
vote
1answer
60 views

how does cache work on hyperthreaded Intel Xeon Processors

I am running some experiments on a research database on EC2 using a c1.xlarge instance. As far as I can tell, the c1.xlarge uses 8 hyper-threaded virtual CPUs. Amazon also says that this instance uses ...