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

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4
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0answers
48 views

Slab usage extremely high?

On a Centos 7 server with 32GB RAM memory I am running a few programs namely MySQL, Apache2, PHP. Recently I wanted to verify the amount of ram left as I was planning on installing a few more ...
3
votes
0answers
130 views

How do I clear cached SSL state data from schannel?

I'm trying to clear SSL state data for a normal TLS session (no client certs are involved) for Outlook when connecting to a SSL based CAS server. How do I clear the SSL state of SChannel? Does the ...
3
votes
0answers
1k views

How to measure dcachesize usage (and reduce it)

I have a VPS running CentOS 5.7 (Final), 32-bit. Right after boot, when I run # cat /proc/user_beancounters I see that my dcachesize usage is at about 4100000, while my VPS is set up with a limit of ...
3
votes
0answers
269 views

Restricting cache-storage for IIS server-side webrequests

We have several old websites running classic asp that invokes a series of HTTP-request to external systems (in this case, geo-ip-lookup). This is just a single request, resulting in a country-code as ...
2
votes
0answers
25 views

Do we get a access.log entry for content served from cache in nginx

For a configuration that looks like http { proxy_cache_path /etc/nginx/cache keys_zone=one:10m; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; server { ...
2
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0answers
218 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 ...
2
votes
0answers
238 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 ...
2
votes
0answers
272 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 ...
2
votes
0answers
200 views

NFS showing files in directory, but can't open or stat

I'm using a network of Linux (Debian Squeeze on kernel 2.6.32) machines, sharing files using NFS (v3). The scenario is that a process running on client A will create a file through NFS on file server ...
2
votes
0answers
272 views

How can I optimize the Windows file cache so flushing a file is faster?

I have a third-party, object-oriented database server running on a Windows Server 2003 x64 machine with 24 GB of RAM. Except for some system processes and monitoring tools, the database server is the ...
2
votes
0answers
1k views

Best opcode cache for fcgid? (APC vs eaccelerator vs xcache)

I have been reading a while the web trying to find out about opcode caches for fcgid. As I understand so far APC is not a good solution for fcgid, since APC with fcgid caches only per process and that ...
2
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0answers
208 views

How to make background flushing more aggressive

I've got a system that is doing a continuous steady stream of writes to GFS2 filesystems, and what happens is that the cache builds up to vm.dirty_ratio and then load skyrockets during a synchronous ...
1
vote
0answers
26 views

Number of previous logons to cache - is there any way to override the limit of 50?

The goal is to have over 100 users be able to log into an offline machine using their cached domain credentials. Is there any way to override the limit? Do I have any other options for storing ...
1
vote
0answers
16 views

counter for availability of dedicated Azure cache

The following link have a list of Azure caching perf counters : http://msdn.microsoft.com/en-us/library/azure/hh914135.aspx#PerfCountersc2 we are interested in, to get the utilization of the cache ...
1
vote
0answers
49 views

Transparent data caching in multi-site environment

I need an advice on choice of the right technology for my problem. I have geographically distributed multi-site environment where there is one main site and a number of remote sites. Main site ...
1
vote
0answers
25 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?
1
vote
0answers
36 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 ...
1
vote
0answers
29 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
0answers
35 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 ...
1
vote
0answers
54 views

PHP define in config file does not update with new value

I have just installed a new system and set up the configuration file (DB settings). the conf' file has the following definitions: define('DB_USER', 'user'); define('DB_PASS', 'pass!'); It all works ...
1
vote
0answers
288 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 ...
1
vote
0answers
42 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
57 views

How to tell apache to look for last modified date before serving an old modified HTML file?

On certain requests my Django application updates static HTML files. However apache is serving them old copy from its cache... How can I configure Apache to make sure serve latest file changes.. ...
1
vote
0answers
25 views

Keeping a local mirror lean and mean for what our application needs

We have a local mirror RPM repositorythat lives where our virtual servers live on Amazon Web Services. This setup could conserve some network bandwidth, but my predecessor probably set it up as place ...
1
vote
0answers
251 views

Windows Server - Active Directory users: Clear Caches

On Windows Server 2008/2003, users are logging in via Active Directory. So I believe that all of them have cached local settings when they log in the first time and onwards. How/Where do you clear ...
1
vote
0answers
488 views

Copied redis dump.rdb server to new server, only loads < 5 MB into memory instead of ~1 GB from previous server

I am migrating redis servers (from 2.2 to 2.6, if that's relevant), and after I do a "SAVE" on the old box and copy the file to the new box, I put it in the same location from /etc/redis/redis.conf as ...
1
vote
0answers
195 views

Rapid increase in n_lru_nuked objects in varnish cache with enough malloc to spare

We are using varnish 3.0.3-3.5 on amzn ec2 and it is allocated around 3G of malloc. It starts with normal caching of object but when it hits a certain no of object+objecthead(around 14k), n_lru_nuked ...
1
vote
0answers
310 views

IIS caches things, even when I disable output caching

I have an IIS web server on my local network for development purposes, and I want to disable all caching mechanisms. IIS seems to be caching everything, even when I disable output caching like so: ...
1
vote
0answers
76 views

apache reverse proxy - make static content cachable

I have an apache web server (reverse proxy with mod_proxy) in a front of a tomcat java application. to improve performance, i would like to make static content (css, javascript and images) cachable ...
1
vote
0answers
170 views

Data Cache (XCache, APC, memcached, etc) on shared hosting / privacy considerations

I have one question. How appropriate is to use on shared hosting a cache system for data? I mean as far as I know the data is written in a shared data cache (not private for each user) across all ...
1
vote
0answers
82 views

.htaccess recommendations to prepare for new launch of website - caching

Currently my website has cache controls set for javascript libraries and images, and caches them for one week. I'd like to know what best practices I should following leading up to my websites ...
1
vote
0answers
317 views

Varnish cached 'MISS status' object?

My site uses nginx, varnish, jboss. And some url will be cached by varnish, it depends a response header from jboss. The first time, jboss tells varnish doesn't cache this url. Then the second ...
1
vote
0answers
279 views

How to disable Nginx web pages caching to avoid ISP cache?

My problem is simple. I did some changes on a homepage this morning (add some sentence) and it did not appear in my browser. I cleared symfony cache, nginx cache, apc cache, restart apache, restart ...
1
vote
0answers
110 views

Why does this one file not respect .htaccess' cache-control header?

Testing performance improvements, I added an .htaccess file with the following directives to my /assets folder (where I store a few images of various types). <FilesMatch ...
1
vote
0answers
77 views

File-based reverse proxy cache with lru gc?

For a project I'm working on I need a file-based reverse proxy cache where I limit the size of the cache to some setting and have the ability to "gc" the cache based most likely on a lru algorithm. ...
1
vote
0answers
441 views

High varnish CPU load when combining it WordPress and nginx for multiple sites

I recently applied the following setup to install WordPress plus W3 Total Cache on an nginx server with a varnish frontend to achieve high scalability. It works great when I'm only running one virtual ...
1
vote
0answers
140 views

Does libapache-mod-deflate cache compressed result?

I got some json files to be served by apache httpd and their size are pretty big. (~100KiB) So I put mod_deflate into httpd server and applied to application/javascript mime type. I think ...
1
vote
0answers
407 views

Capistrano deploys break W3 Total Cache minify URL rewriting

I am running WordPress 3.2.1 on Linux on EC2 with Amazon CloudFront. Most of the caching/CDN services are working fine. However, minify URL rewriting is not working. I get this error in the web ...
1
vote
0answers
2k views

Leverage browser caching on nginx

I am using nginx for my webserver. I am trying to set an expiry date or a maximum age in the HTTP headers for static resources but it doesnt work. This is what i am using; location ~* ...
1
vote
0answers
200 views

Tracking huge buffer usage under Linux

I'v a Linux server running under Debian Lenny with 4Go of RAM. It doesn't run a large number of stuffs: Postfix/spamassassin (daemon mode) Bind9 KVM (one guest - 1Go of RAM for it) Every day at ...
1
vote
0answers
639 views

squid and parent/sibling

I tried to configure sibling on my caches in order to let them talk with each other and it never works; udp_miss000 is the error. The only way that worked is to to make one of them parent, but still ...
1
vote
0answers
583 views

SAP Portal: SAP Universal Worklist Items Cache - Clear Cache option not working (runs continuously)

When I click on the 'Clear Cache' option within the SAP Portal UWL I get a 'working' dialogue box (spinning icon), even after an hour. This normally works (and takes less than 10 seconds). Any ideas ...
1
vote
0answers
291 views

Ram cache on Windows Server 2008

Scenario: We have a file cluster on a UNC share. A couple of IIS web servers serve files from this UNC share. This is done through a IIS-module, and this module does not use the built-in IIS-caching ...
0
votes
0answers
17 views

Disable file content/data cache for NFS?

I'm using NFS to share a directory between host (nfs-serer) and guest (nfs-client) system. I did not want to use KVM's preferred module 9p due to slow transfer speeds - NFS, does yield about twenty ...
0
votes
0answers
19 views

Apache + PHP (fast-cgi) + Wincache on Windows Server crashing

We have one PHP application that runs on Windows Server 2008 Apache 2.2.23 PHP-5.4.27 (FastCGI) Wincache 1.3.4.0 and crashes from time to time and I'm not able to figure out what's going on. ...
0
votes
0answers
27 views

website has problems for one person but not for another

My partner and I run 2 websites that I can access fine in all 3 major browsers. He unfortunately can not. He gets "too many redirects" error in Chrome and 404 error in IE but only for the one website. ...
0
votes
0answers
39 views

NGINX: proxy_cache altering headers

I have been having trouble building a proxy between my server and s3 to cache requests. I finally boiled it down to a single point of failure... http{ proxy_cache_path /home/cache levels=1:2 ...
0
votes
0answers
34 views

Nginx proxy cache invalidating request to s3

I have set up a proxy from my application server to a private s3 bucket to cache requests. I was having some trouble with it where s3 was rejecting my download requests (403 forbidden) and after some ...
0
votes
0answers
71 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
votes
0answers
33 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 ...