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

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3
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0answers
200 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
284 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
44 views

Nginx cache unmanaged growth

We have two Nginx servers with independent local caches for caching images. Periodically there is problem with unmanaged growth of cache's size. This size may be far larger than max_size in ...
2
votes
0answers
187 views

Problems on mounted NFS: 'No such file or directory' but files and directories exist

So we are having a medium-sized NFS4 storage server running CentOS 6.6 exporting an NFS share /storageDat (which is the NFS root, with two RAID volumes bound in there: ./dat1 and ./dat2); Export ...
2
votes
0answers
75 views

start nginx despite missing upstream

I like to run nginx as a local proxy server, serving stale cache files if the upstream server is unavailable. This works well, except the local machine is restarted, while the internet connection ...
2
votes
0answers
204 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 ...
2
votes
0answers
47 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
votes
0answers
297 views

LSA SID cache keeps old entry for renamed domain user - why?

I have a question about LSA SID cache on a domain member server. Recently I run into the issue when some users after their name was changed in AD has difficulties accessing application I support, and ...
2
votes
0answers
408 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
395 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
261 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
207 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 ...
2
votes
0answers
306 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
votes
0answers
237 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 ...
2
votes
0answers
585 views

How can I exceed the 60% Memory Limit of IIS7

Pardon if this is more stackoverflow vs. serverfault. It seems to be on the border. We have an application that caches a large amount of product data for an e-commerce application using ASP.NET ...
1
vote
0answers
21 views

slabtop command doesn't work

I've inherited Sys Admin duties on webserver and I'm a bit of out my element, but learning as I go. My newest issue is all the of the ram has been gobbled up and I'm not sure where it has gone. free ...
1
vote
0answers
14 views

what is the the difference between all the NSS caching daemons?

I would like to see a comparison between nscd, unscd, nsscache, sssd and nss-pam-ldapd. Those are all the alternatives to nscd that i could find in Debian... Our setup is that we have a bunch of ...
1
vote
0answers
20 views

WordPress Nginx Browser Cache Expires on Extentionless URLs

Struggling a bit with the following. Adding expires for JS and CSS, plus other static files is easy: # Directives to send expires headers. location ~* \.(?:css|js)$ { expires 28d; ...
1
vote
0answers
43 views

Keep file system meta data in cache with vfs_cache_pressure

My Ubuntu Linux (virtual) servers run rdiff-backup daily, which looks at all file meta data to determine what needs to be backed up, slowing it down. It does this every day, even though most files ...
1
vote
0answers
70 views

Nginx proxy_cache / Varnish - parallel requests trigger multiple requests to backend?

I am looking for a HTTP reverse proxy that will handle HTTP live streaming use cases in a performant manner. Assume file/fragment sizes up to 4MB with a constant load of client requests for the same ...
1
vote
0answers
86 views

How to force a refresh of cached permissions without a restart

We've recently started going through shares replacing named permissions with AD groups (i.e. so that when updating permissions we don't need to worry about the time taken or risks involved in updating ...
1
vote
0answers
96 views

Rewrite a url to a a new URL and then send the new URL to a PHP script

I have URLs that contain a cache busting string. I want to rewrite these URLs without the cache busting string, and then send the rewritten URLs that match a certain criteria (e.g. audio/video files) ...
1
vote
0answers
40 views

NVA: rewrite before or after Varnish?

I'm planning an NVA server system (Nginx-Varnish-Apache), where request are routed through in that order. Apache would be serving WordPress CMS or similar. I'm wondering where to apply additional ...
1
vote
0answers
21 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
80 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
210 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 ...
1
vote
0answers
91 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
vote
0answers
69 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
94 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
56 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
62 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 ...
1
vote
0answers
67 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
550 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
47 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
60 views

How to make BIND return old cached enties if all forwarders are failed?

I have a local forwarding BIND server installed at localhost. In its configuration there is a couple of forwarders: options { ... forwarders { 1.2.3.4; 5.6.7.8; }; ... }; Servers which are pointed ...
1
vote
0answers
78 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
30 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
354 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
669 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
279 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
572 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
92 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
359 views

Nginx, wordpress: Unable to proper reverse proxy caching due to Set-Cookie. Recommendation for a good strategy

I am trying to do reverse proxy caching for a wordpress blog and I am hit with snags. The initial configuration was a simple reverse caching like this location / { proxy_cache_key ...
1
vote
0answers
340 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
307 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
115 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
78 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
504 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
487 views

ASP.NET, IS7 and IE8 caching?

We're suddenly having problems with some of our sites having old versions of .css and .js files show up in the browser. Generally, these problems go away, when the user clears cache in the browser. ...