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

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0
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0answers
5 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
3k views

Squid refresh_pattern won't cache “Expires: …”

Background I frequent the OpenGL ES documentation site at http://www.khronos.org/opengles/sdk/1.1/docs/man/. Even though the content is completely static, it seems to force a reload on every single ...
1
vote
1answer
43 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 ...
1
vote
2answers
30 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 ...
0
votes
1answer
805 views

Nginx proxy cache (proxy_pass $request_uri;)

I need to create proxy web using nginx. If I access http://myweb.com/http://www.target.com/ the proxy_pass should be http://www.target.com/ Here is my configuration: location / { proxy_pass ...
0
votes
1answer
81 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. ...
3
votes
1answer
2k 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 ...
2
votes
2answers
394 views

How to invalidate nginx reverse proxy cache in front of other nginx servers?

I'm running a Proxmox server on a single IP address, that will dispatch HTTP requests to containers depending on the requested host. I am using nginx on the Proxmox side to listen to HTTP requests ...
0
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0answers
28 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().. ...
1
vote
1answer
1k 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
1answer
37 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: ...
0
votes
1answer
1k views

setting Expires date in iis6

i try to control my iis6 caching i was able to set Cache-Control public, max-age=1000000 but i can't set the Expires any help?
2
votes
2answers
60 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 ...
1
vote
2answers
885 views

tuning linux cache settings for inode caching

I am dealing with hundred million files in a filesystem (distributed among a lot of subdirectories), and I need to be able to list them very quickly, particularly in order to rsync them efficiently. ...
2
votes
2answers
1k views

Unusual Caching Issue with IE 7/8 and IIS 7

We recently moved a site into production running Server 2008 x64 and IIS 7. The ASP.NET pages apparently load just fine, but when it comes to IE 7 and 8, a weird caching issue has cropped up with the ...
1
vote
2answers
477 views

Squid proxy refusing to revalidate cache when Vary header present

squid.conf cache_effective_user squid http_access allow all # Squid normally listens to port 3128 http_port 3128 accel defaultsite=localhost no-vhost ignore-cc cache_peer localhost parent 80 0 ...
0
votes
0answers
31 views

Social Engine + Apache2 + Nginx Reverse Proxy [closed]

i'm trying to setup an apache2-Server on Ubuntu 14.04 (and Debian 7.6) with nginx as a reverse Proxy and varnish as a cache. Configuration so far: === NGINX ==== /etc/nginx/proxy_params ...
1
vote
4answers
1k views

APC PHP cache size does not exceed 32MB, even though settings allow for more

I am setting up APC (v 3.1.9) on a high-traffic WordPress installation on CentOS 6.0 64 bit. I have figured out many of the quirks with APC, but something is still not quite right. No matter what ...
0
votes
3answers
4k views

Squid closing the connection on long HTTP GET requests

When running a database query on a specific external site we use, Squid seems to cut off the connection after a consistent period of time (just over a minute). The query is submitted through a ...
3
votes
1answer
152 views

Growing OS cache in RAM causing high system CPU usage

Long question, so please bare with me: I'm having a weird issue with a server that I've never seen before. On a machine with ~30G of RAM with an application that takes ~10G (spread across hundreds of ...
0
votes
1answer
31 views

Nginx not caching any proxied requests

I believe I've properly set up nginx to cache all requests proxied to PHP-FPM, but it's not working. Here's the "http" bit from /etc/nginx/nginx.conf: http { include ...
-1
votes
2answers
45 views

Nginx and its caching systems. Are they all the same?

I'm a bit confuse about PageSpeed, Microcaching and Memcached. Are they just different tools that do the same job? I was initially thinking in use PageSpeed with Nginx. If I do that, do I need ...
2
votes
1answer
717 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 ...
2
votes
2answers
2k views

Clearing Java certificates cache (force reload certificates)

A simple question here. One application gave me this exception when trying to access a website with a expired certificate: java.security.cert.CertificateExpiredException So, I renewed the ...
5
votes
6answers
2k views

For a small home network, is there any point to running Squid? [closed]

For a small home network -- two laptops, two desktops, plus the main server -- should I expect much gain by running Squid on the main server? I fully understand the value of running a caching name ...
-1
votes
1answer
24 views

cache images that has been resized with php [closed]

URL of the image is like this resize.php?image=imagename.jpg&w=100&h=100 and I want to cache the result in RAM. Can APC of php do it? how? Or I must install something else?
0
votes
0answers
78 views

How can I cache android packages using squid Cache?

I have a wireless Access point with another system using debian and squid/dansguardian as a transparent proxy to filter adult content. I can see that 90% the traffic comes from android phones and ...
0
votes
0answers
10 views

SoftPurge doesn't work correctly in varnish

I am trying to use Softpurge mentioned here: http://www.smashingmagazine.com/2014/04/23/cache-invalidation-strategies-with-varnish-cache/ I run in terminal the following command: curl -X PURGE ...
0
votes
1answer
182 views

How to find L1, L1i, L1d cache from dmidecode output?

How to find L1 , L1d, L1i cache from dmidecode output ? (NOTE: dmidecode file is from different server for which I do not have access, So I can not run lscpu command to find the same) ...
0
votes
2answers
38 views

How to prevent nginx caching blank pages?

I have nginx 1.4.3 running on a Ubuntu 12.04 machine. I have nginx set up to cache pages (they are database-driven but stay fairly static). I'm using MySQL and PHP-FPM. However, I found that I would ...
0
votes
1answer
55 views

How do I determine where an SSL certificate is being served from?

I am having the same issue described in this question: IIS 7 Still Serving old SSL Certificate I have replaced an old SSL certificate with a new one and completely removed the old certificate from ...
-1
votes
2answers
158 views

PHP Warning: Module 'apc' already loaded in Unknown on line 0

I am on a dedicated server with my site hosted in a virtual directory. There are few other sites hosted in different virtual directories. I have APC and APCu installed. When i restart PHP-FPM i get ...
0
votes
0answers
17 views

Can not analyze output from Squid and varnish

I'm using one Squid server between tow cache server. I get from headers following information: X-Cache MISS, HIT from cache-zz X-Cache-Age 515 X-Cache-Control public, max-age=3600 X-Cache-Lookup HIT ...
0
votes
2answers
69 views

Can zend opcode cache and APC cache run together on same server?

I am on a dedicated server - running multiple portals in respective virtual directories. Some of the previously loaded websites are using Zend opcode cache. While my new commerce portal uses an APC ...
4
votes
2answers
17k views

Clearning Chrome SSL cache?

I have a haproxy / stunnel server that handles SSL for our sites on AWS. During testing I created a self signed cert on this server and hit it from my desktop using Chrome to test that stunnel was ...
0
votes
0answers
21 views

How can I configure what to cache in nginx?

I have a REST API for which I'm using nginx as a reverse proxy. I want to cache certain calls to the API which use absolute time references in the request but I want to not cache calls which use ...
0
votes
1answer
43 views

Does fsfreeze flush FS caches?

If I run fsfreeze on a mounted filesystem, it will not be possible to perform new "write" operations on that FS until it is unfrozen, and "ongoing" writes should "complete". Now, will fsfreeze also ...
-4
votes
2answers
85 views

insufficient space in download directory /var/cache/yum/updates/packages [closed]

I try to install vim-enhanced using #yum install vim-enhanced I got an error like this insufficient space in download directory /var/cache/yum/updates/packages I found some answers to the this ...
0
votes
1answer
17 views

windows server which files are in cache

Is there a way to see which files are cached in a windows server 2008R2? I'd like to see/analyse which files are being used most to make choices how to optimize data on a server and for this it would ...
0
votes
0answers
23 views

Browsers ignoring no-cache headers when 302 status

I have a proxy server that will either deliver you the website contents or redirect you to a login page if your IP is not recognized (using iptables). This works fine for redirecting to the login page ...
1
vote
1answer
536 views

Apache cached old ssl certificate

About 2 weeks ago I bought a new wildcard SSL certificate for all of my servers, and immediately tried to set it up on a server by replacing the old self-signed certificate settings. So, I put in the ...
0
votes
0answers
35 views

Server serves old cache/memory/data with linkchecker agent

I'm using the perl script below to fill the cache/memory of the server by visiting all the links with the wget command and the linkchecker agent to check for broken links. When I run it it keeps ...
3
votes
2answers
876 views

How to setup Apache 2.2.3 to send “last modified” etc

and to tell browser to reload an object (and/or a page... everything on the site) only if is been modified since last visit time??? htaccess, httpd.conf... have you a ready directive right for my ...
0
votes
0answers
11 views

Is it possible to cache LDAP responses from referrals in other servers in AD?

I have a LDAP server that is called from a number of sites that each have their own (isolated) instance of AD Directory Services. Is it possible to cache an LDAP query, and response, in a local ADDS ...
0
votes
0answers
19 views

Varnish Backend Back To Live After “Service Scan” by Domain Dossier

My Varnish Cache works fine except there is annoying issue that every few hours, the backend probe will report sick for 3 of my 4 backends. So site can't open, report 503 obviously. The strange thing ...
3
votes
3answers
94 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
66 views

Empty $upstream_http_location variable if response was cached

I would like to cache the response of an redirect. (Cache the request to some site which returns a redirect and cache the second request which returns the actual content.) So far my config looks like ...
49
votes
10answers
6k views

Why drop caches in Linux?

In our servers we have a habit of dropping caches at midnight. sync; echo 3 > /proc/sys/vm/drop_caches When I run the code it seems to free up lots of RAM, but do I really need to do that. ...
3
votes
1answer
1k views

How do I speed up and cache mmap file access over NFS on Linux?

The server and client are both 64-bit Ubuntu 10.04 LTS. The application in question is a custom app that uses mmap() for fast random file access. Its ideal state is when the entire file is cached in ...
0
votes
0answers
20 views

MediaWiki migration showing errors with old directory structure

I recently migrated a server from an Ubuntu machine to a more appropriate and easier to maintain CentOS 6.5 VM. After moving the software over and ensuring the paths are all corrected, or so I ...