Questions tagged [cache]
A location or process for storing of transitory or temporary data in order to improve application or system performance.
1,546
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Massive performance issue for just two users in UI and Download
I have a strange issue with my self hosted nextcloud instance:
All works fine, but I have two users who report huge issues with speed when accessing that nextcloud. Two independent effects apparently:
...
- 168
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28
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Disable linux cache memory
Currently i have a server with 4 gb of ram runing 2 rsyncs task (100gb each) every 5 minutes and some monitoring containers, eventually the linux cache eats all ram (rsync faults) and if the ...
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133
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The server's host key is not cached in the registry
There is a scheduled job to send files via psftp command (psftp -bc -v -P 22 -l username -pw password -b upload220506.ftp ftpsitename) in windows server. It is already cached by running exe ...
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Nginx cache - keeps clearing itself
I am using nginx caching in Plesk obsidian.
All seems to work fine apart from the fact that if I watch the cache directory I can see that it will build up, then a few minutes later the overall size ...
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Nginx - disable rate limiting for cached resources
I have an application does full text search on my product database. Certain searches are suggested to the user and are much more common than other searches.
As full text searches are expensive, I'm ...
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37
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How to properly cache content in NGINX like in Plus version?
I saw official NGINX tutorial regarding content caching and tried to modify it according to my needs. I use CDN (Cloudfront), but the performance doesn't convince me. If my server was more faster it'd ...
- 115
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110
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getting 412 precondition failed with ngx_cache_purge when trying to purge cache
I am new to this and just started using nginx for my pet projects. now i would like to install and use ngx_cache_purge module from https://github.com/nginx-modules/ngx_cache_purge, since it has some ...
- 101
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35
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Arp behavior on non requesting user for response
If we imagine we already have a valid cache for a pair in computer B and then composer A asks about the same pair and computer C responses with the pair information, what would happen here to computer ...
- 131
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83
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MariaDB cache going cold overnight
We are running a LAMP stack which includes MariaDB 10.5.15 on Centos 7. It's a dedicated server with 4 CPU's and 8GB RAM.
Never had a problem until the last few weeks, where I noticed slow queries ...
- 345
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109
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Why does drop_caches increase "available" memory
I encounter low memory issues on proxmox 7 nodes I'm managing. When reading about similar problems I was directed to linuxatemyram.com, after reading this page I started monitoring "available&...
- 71
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90
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NGINX Reverse Proxy And Cache MS Graph API
I'm building a web based company directory which has roughly 450 employees. The data source being used is the Microsoft Graph API (Azure AD). This API requires you to make a request for every employee ...
- 103
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centos Fatal error: Uncaught RedisException: Cannot assign requested address in
We receive this error every few minutes on the server
Fatal error: Uncaught RedisException: Cannot assign requested address in
i set bind ip and firewall command like :
firewall-cmd –permanent –new-...
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70
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Slow response time when server is idle, fast response time when server is loaded?
I'm running a 40 thread / 125GB RAM server.
The server is based on CentOS 7.
I have noticed that the server response time is higher when the server is idle:
You can see on the screenshot here that ...
- 145
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385
views
How to implement caching of HTTP responses in Kubernetes?
How can I cache HTTP responses from my services in Kubernetes?
I have a simple web service in my cluster and am wondering how I could cache static assets (static html, images, fonts, etc.) beyond ...
- 111
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99
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How to Intercept and cache LDAP Search and Bind requests
I have a production web server running Django. Currently every request made requires an LDAP Bind and Search request. I can use the django-auth-ldap plugin to enable LDAP Search caching. However, my ...
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140
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Page cache in Kafka
We are receiving alerts for kafka memory utilization in our kubernetes cluster and analysing it seems that most of the memory is page cache. I am aware that kafka uses loads of page cache for IO ...
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100
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NFS with FS-Cache - set up, but still says it's disabled
I have about the same problem as this one here, but that one seems to have been solved because cachefilesd hasn't been enabled. I have it enabled (removed the comment before RUN=yes in /etc/default/...
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check-host.net "broken pipe" HTTP status on my Bluehost Wordpress Nginx
Issue: 502 Bad Gateway
So our team always reaches out to Bluehost Support regarding the issue. They can't fix it by themselves. We can't fix it either on the WordPress dashboard.
Please see attached ...
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31
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NGINX - Only cache files larger than 10M
I am using NGINX in a unique situation where I and using a reverse proxy for Sonatype Nexus and I only want to cache files if they are larger than, say 10M.
Here is what I have so far:
upstream ...
- 155
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191
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Where is IIS output cache location, and how can I relocate it?
I've successfully configured IIS output cache. However after repeated google pagespeed tests it seems that the page speed is even slower with output caching compared to without output cache ...
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Is it necessary to set a different ttl before change a Route53 DNS record value?
The first time create the Route53 DNS record with a load balancer origin DNS name with ttl 1 day.
After some days, we want to change the value to another load balancer origin DNS name. Do we need to ...
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35
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CDN video caching duration
Are there any standards about for how long (days, weeks) do CDNs cache video content?
This other answer suggested that it is only for a short period of time (e.g. 1 day) but that information is almost ...
- 275
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154
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Apache: I cannot set full cache header for text/html using htaccess
I had a similar problem where I couldn't set the full cache header for JS and CSS files in my htaccess file, and it turned out I couldn't because the cache expiry was being set on the server and I had ...
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how to reduce high memory usage in buff/cache? [duplicate]
I got 4 WordPress site running on a 2gb Debian server, but only two of them got traffics, totals around 800 to 1000 page view per day, but got high memory usage in buff/cache, more than 1gb.
is it ...
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293
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LVM aggressive read and write cache
I've added a 2 TB RAID1 SSD as a writeback cache to a 10 TB RAID1 HDD using LVM 2.03.11(2) (2021-01-08) like this:
lvcreate --type raid1 --mirrors 1 --nosync -l 100%FREE -n sshd sshd /dev/sdc /dev/sdd
...
- 260
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196
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Apache: Setting cache headers by URL in htaccess
I tried to use this solution, which seems to do what I want:
https://serverfault.com/a/995029/955515
I couldn't leave a comment on that answer, because I'm new and it says I need 50 reputation points ...
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35
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How to distribute Varnish cache differently to different kind of requests?
I have a redirect in my store that shows a different store view based on the client's location.
It reads the header via Fastly and redirects the customer to a different store view using every time the ...
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27
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Why apache2 mod_cache_disk cant store files in ramdisk?
I use Apache2 mod_cache_disk with symlink to my ramdisk: /tmp/ramdisk/mod_cache_disk
but I cant get it to work :( It only works when path leads to real directory. How can I fix this problem ?
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59
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only flush the write cache if there's no read activity
Normally the Linux Kernel flushes the write cache if a specified time limit is exeeded or the cache is full. This leads to stalling with HDDs since the writing process makes reading processes much ...
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212
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Adding location-block to cache files makes those files return 404
I want to cache some static files using Nginx. But I somehow can't get it to work.
This is my nginx.conf:
user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*....
- 105
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180
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NFS cache on Linux client but only for metadata?
I have several mounts shared via NFS. They contain loads of files, from text files to RAW photos.
Issuing find on them is rather painful as even on 1GbE link it just doesn't happen as smooth as on ...
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462
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How can we remove Google cloud builder cache. I am trying to build an image but it gives an error from a previous build attempt
This is the error it gives but the thing is I corrected the "MKDIR" command to mkdir but the error didn't go away, there is no MKDIR command in my Dockerfile anymore but the error stays the ...
google-cloud-platform
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128
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NGINX: Can I to use proxy_no_cache directive with upstream response body for conditional caching?
We are using Ngnix as a cache-proxy in front of a 3rd party service and have the following directive to ensure upstream responses with a status code of 200 are cached...
proxy_cache_valid 200 364d
The ...
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23
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Sessions lost on specific network only
NOTE: My apologies - I am not a server admin, but I have a problem that I believe may be server related, or combination of server and network related. I do not have too much technical information ...
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lvmcache/dm-cache writeback cache full performance
I have a SSD writeback cache in front of a HDD, set up through lvmcache (so a dm-cache). When the cache LV is not full (Data% column in lvs < 100.00%), writes go to the cache device (monitored via ...
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59
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"The User Agent is required to access this page" message only goes away when I clear NGINX cache
I'm new to NGINX and can't really tell if there's a problem with it or with our app. My PHP application has a php package Device Detector that is responsible for User Agent info as well as CodeIgniter,...
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1
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320
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How to automatically purge cache with nginx using the http-cache-purge module (ngx_http_cache_purge_module.so)
I am running an Ubuntu 20.04 LEMP server with wordpress installed on it.
I am using the nginx.org repository for nginx, but I compiled the cache-purge module (ngx_http_cache_purge_module.so) from ...
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84
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Caching 401 response on bad token in nginx njs
In our application whenever a token (that arrives in a header) is invalid - it is practically guaranteed there won't be an exact valid token.
So I'm trying to offload the responsibility of responsding ...
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173
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Keycloak: Difference between Authentication sessions and User Sessions
I was going through the documentation
https://www.keycloak.org/docs/latest/server_installation/#cache
Here they have described different types of caches.
I didn't quite understand the definitions they ...
- 123
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37
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Router forces browser to use older, presumably cached, webfiles
We are trouble shooting website where we deploy a new version but our Computer browser still pulls the older pages. When we disconnect from the router (WiFi) and connect to a hotspot (mobile phone/...
- 285
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196
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HTTP_IF_NONE_MATCH Missing on Server Side with Chrome Requests to NGINX
I'm trying to add etag based cache verification to a web app I've developed that runs on Apache via an NGINX reverse proxy. The web app is written in Perl. In the Perl script, I check for the $ENV{'...
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35
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Why I'm Getting "Service web-cache lost on WCCP clinet" error on cisco router?
I'm configuring wccp and squid.
Here is wccp configuration or router:
ip wccp web-cache redirect-list wccp-access group-list wccp-server
!
interface FastEthernet1/0
ip address 10.10.10.1 255.255.255....
- 21
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368
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MySQL performance issue due to caching
perl mysqltuner.pl --host 127.0.0.1
[--] Skipped version check for MySQLTuner script
[--] Performing tests on 127.0.0.1:3306
[!!] Successfully authenticated with no password - SECURITY RISK!
[!!] ...
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46
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Why browsers fetch images again after reloading my page?
I am developing a web app, and I want all the images (a couple hundred MB worth - 20 000 - 50 000 thumbnails) to be downloaded once and never downloaded again, as those don't really change. Also, ...
- 103
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186
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Squid : Do not cache these destinations ( I do not want some address to be cached by squid )
I have a virtual proxy client and I have a squid proxy server. I would like to add some addresses to block caching for them. Either their domain or IP address:
www.apache.org
188.184.21.108
root@...
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70
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Nginx caching not working for crawlers
I have been using Nginx caching for years but recently noticed an issue which I suspect has been happening for years.
If I access a page that's never been visited before I of course get a cache miss, ...
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103
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Setting Nginx expires epoch header selectively
I have a folder containing imagery on my server that is used to service both a mobile app, via a CDN, and to work with a backend webapp used to manage the content delivered to the app. For the latter ...
- 173
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Disable nginx cache for a specific URL in site [duplicate]
We want to disable cache on a specific URL in our site.
The problem we have is that when a user buys something, this purchase only is reflected in user's profile when nginx cache is cleared
User's ...
- 1
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49
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Prevent nginx to cache certain parts of a site
Everything works fine on our website, but we have the issue that when a customer buys a course, nginx cache prevents customer to see that purchase on his/her space, this is fix when nginx cache is ...
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48
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How to tell nginx to honor backend's cache? uWSGI
There's a similar question but solution there doesn't work for me.
We have nginx and uWSGI ad backend. We need nginx to cache the backend response according to what is in the response header.
For ...
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