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Caching-Headers for Images are always "no-cache" and "expires: -1"
The configuration section isn't all that clear in the current version but the caching is controlled by two parameters that you can set in the manager interface from System > Parameters. Here you have the two parameters CACHE_PUBLIC_EXPIRES and CACHE_PUBLIC_MAXAGE which specifies the time, in minutes, of the client browser cache. These are set to 0 by default since you don't want cache enabled

Categories : Caching

Valgrind cache profiling of two different parts of a function
To check function-by-function values, you have probably used cg_annotate like this: cg_annotate cachegrind.out.1234 If you add the "--auto=yes" flag to that command, the values will be displayed for each line: cg_annotate --auto=yes cachegrind.out.1234 You can print the result into a file so that you can search for your function. Note that only lines and functions that have a major performan

Categories : Caching

Nginx not caching requests coming through ELB
This is caused by a wobbly implementation of HTTP caching headers in what's behind ELB. Per RFC 2616 (HTTP 1.1) : Pragma directives MUST be passed through by a proxy or gateway application, regardless of their significance to that application, since the directives might be applicable to all recipients along the request/response chain. HTTP/1.1 caches SHOULD treat "Pragma: no-cac

Categories : Caching

Caching all entities in Cache Layer and Synchronizing with Database
yes you can design a system that will On addition: persists data to db and adds to cache On read: reads data from cache, and considers a cache miss as not present in database as well. On update: updates data in db and then updates in cache (or vice versa) On delete: deletes data from cache and then deletes from database This approach will work fine if you have a single application using that d

Categories : Caching

How do i use Cache Control and ETag to set http headers
You can use your .htaccess file at the root of your website for this. You'll find lots of variations on the specifics, here's a comprehensive one from http://www.siteground.com/tutorials/joomla/joomla-speed.htm#htaccess. Using a text editor, add the following to your .htaccess file EDIT If your goal is specifically to improve your YSlow score and you aren't using these tags for any other pu

Categories : Caching

cache coherence MESI protocol
When a cache line is written to, the state of the line becomes 'M'. In all other caches the state becomes 'I'. Thus the last two lines of your table are not correct. When P1 writes C, it invalidates the line in P0. So the 'M' in the P0 cache - VarC should be an 'I'. A line transitions from the 'M' state to the 'S' state if cache other than the one who has written the line does a read.

Categories : Caching

How to cache the result of a Task when using it as an Observable with retry?
What about.... Observable .StartAsync(() => Observable .FromAsync(reserbusAPI.GetPlacesTask<City>) .Retry() .ToTask()); The outer StartAsync makes sure the eventual result from the created task is buffered while the inner FromAsync with Retry makes sure that GetPlacesTask is called as many times as needed. However, the whole retrying-thing still starts even

Categories : Caching

In Weblogic 10.3.5, is there any way to expire an html file from cache without going through a server restart
There's a way indeed, the parameter "Resource Reload Check (in seconds)" which can be found on a web app setup is what you're looking for. I've setup this to 5(secondes) in order to have a periodic refresh on dynamic ressources generated by an application engine (an xml parsed by an xslt) For some details here's doc of 12.1.2 but I confirm it exists also on 10.3.4 (so on your version too) : http

Categories : Caching

Translate Extbase Extension with locallang.xlf, but nothing happens?
Template and language handling are independent components in TYPO3. Therefore the template files you overwrite the original with cannot "know" that you copied the language files somewhere else. You have several options. Just for the record, overriding labels for the frontend can be done comfortably using TypoScript: plugin.tx_yourext._LOCAL_LANG.[languageKey] { labelKey = New label text }

Categories : Caching

Tomcat 8 throwing - org.apache.catalina.webresources.Cache.getResource
You have more static resources that the cache has room for. You can do one of the following: Increase the size of the cache Decrease the TTL for the cache Disable caching For more details see the documentation for these configuration options.

Categories : Caching

Possibility to background cache to a specific RMDatabaseCache from the RMTileCache?
Did you set the RMMapboxSource to be cacheable ? Also what I did was inserting the RMDatabaseCache at first level using insertCache(cache, atIndex: 0) Here's the full code, I tried it in offline mode, after downloading the tiles, worked like a charm let database = RMDatabaseCache(usingCacheDir: false) let mapView = RMMapView(frame: self.view.bounds) self.mapView = mapView self.mapView.tileCache.

Categories : Caching

Write operation in distributed cache
A distributed cache will behave like any other distributed system and they all have similar constraints. Data that is written to one node takes time to replicate across other nodes. Of course the more nodes, the longer it will take to be present everywhere. If the distributed nodes are on the same virtual network and maybe in the same data center, then the time to make it to all nodes won't be t

Categories : Caching

What is meant by invalid page table entry?
IMHO, the Wikipedia entry does not handle all cases. For a given virtual address the first step in the translation is to find the corresponding page table entry. Problem 1: The page table entry may not exist at all. AN operating system may limit the page table size so that it does not cover the full virtual address range and the specified address is outside that range. This can also occur with mu

Categories : Caching

Nginx proxy cache invalidating request to s3
If AWS S3 rejects requests (HTTP 403), the origin call is invalid, this is not caching or Nginx problem. In your case Nginx itself accesses S3 via http (80 port), make sure your S3 URL created to be accessed with no HTTPS. Othewise, make proxy_pass https://... This directive proxy_pass_request_headers is not required, also proxy buffering is on by default. It's highly recommended to enable access

Categories : Caching

Laravel cache DB raw query
You may use Cache::remember method: $sorted_taxonomy_record = Cache::remember('sorted_taxonomy_record', 10 , function() { return DB::select( DB::raw( 'select level1.id as level1, level2.id as level2 from taxonomies as level1 left outer join taxonomies as level2 on level2.parent_id = level1.id where level1.parent_id = ' . $taxonomy

Categories : Caching

Minifilter Driver and System chache. Unable to write to physical disk
Now I can tell for sure. The reason why I failed to alter the buffer contents was my stupid encryption algorithm plus my ignorance about cache manager. When I copy the file, writing operation occurs twice. To physical disk, and to the cache. I dont know which one comes first yet. :p My encryption algorithm was just simply doing bit wise operation. So if it does that twice, its just decrypted plain

Categories : Caching

Caching issue in CDN with Varnish
Within VCL you can setup a failover logic, which is triggered on a 404 and switches the backend to the other web server. Example backend default { .host = "192.168.50.50"; .port = "80"; } backend backup { .host = "192.168.50.46"; .port = "80"; } sub vcl_fetch { [...] ### Fail over to backup ### if(beresp.status == 404 &

Categories : Caching

nginx is not caching proxied responses on disk, even though I ask it to
Official documentation tells If the header includes the “Set-Cookie” field, such a response will not be cached. Please check it out here. To make cache working use hide and ignore technique: location /web { ... proxy_hide_header Set-Cookie; proxy_ignore_headers Set-Cookie; }

Categories : Caching

Clear swagger Cache for Jersey project
Following the comments above, the solution is to use com.wordnik.swagger.jaxrs.listing.ApiListingCache.invalidateCache() during the start up of the application. It should be noted that for some version of swagger-core, some parts are static and as such, using it as a shared lib will override the definitions for all the applications that use it on the same application server. The better solution w

Categories : Caching

How to setup infinispan cache in a two node cluster
The cache is not distributed by default, you have to configure it. I suggest looking at the clustered cache quickstart.

Categories : Caching

Understanding Cache memory
I would recommend you to watch the whole Tutorial if you are a beginner. But for your question, lecture 27 to 31 would explain everything. https://www.youtube.com/watch?v=tGarzP488Wc&index=29&list=PL2F82ECDF8BB71B0C IISc Bangalore.

Categories : Caching

Timeout performing SET {Key}, inst: 0, mgr: Inactive, queue: 2, qu=1, qs=1, qc=0, wr=1/1, in=0/0
Timeout performing SET {Key}, inst: 0, mgr: Inactive, queue: 2, qu=1, qs=1, qc=0, wr=1/1, in=0/0 means, it has sent one request (qs), there is another request that's in unsent queue (qu), while there is nothing to be read from the network. there is an active writer meaning the one unsent is not being ignored. Basically, there is a request sent and waiting for the response to be back. Few questio

Categories : Caching

Cache table versus query on full table
As always, it depends on the use case. You don't provide any information about how many records you generate per day... I don't think premature optimisation is a good idea. If you're not experiencing any problems, why would you change? :) Maybe a good first step would be to make sure the columns you're using to filter (maybe "date") are indexed (so everything runs faster). Any modern database i

Categories : Caching

if I am using caching on my website, where cached files are saved?
That depends on what you mean by Cache. Most sites use caching to save bandwidth by reducing the hits to the database or other server resources by not having to re-generate dynamic content on every request. On the other hand, browsers will cache JavaScript and CSS files from websites on the local computer as a part of their normal process. Cookies are 'caching' important information specific to

Categories : Caching

Guava Cache: How to access without it counting for the eviction policy?
From the official Guava tutorials: Access time is reset by all cache read and write operations (including Cache.asMap().get(Object) and Cache.asMap().put(K, V)), but not by containsKey(Object), nor by operations on the collection-views of Cache.asMap(). So, for example, iterating through cache.entrySet() does not reset access time for the entries you retrieve. So, what I would have

Categories : Caching

In Go, what data types are safe to read and write to after retrieving it from a concurrently accessible structure?
1) Am I correct in assuming that these data types present problems for a scenario like this? Yes. Maps and slices have pointers to internal data structures that aren't copied during assignment. But since you're using an interface{} you could also have structs with pointers, which could point to structs with more pointers and so on. 2) How might one go about resolving this issue, so as t

Categories : Caching

For Write-Back Cache Policy, why data should first be read from memory, before writing to cache?
Your guess is almost correct. However this behavior has to be done also in multi-core single processor systems. Your processor can have multiple cores, therefore when writing a cache line (in a WB cache), the core that issues the write needs to get exclusive access to that line. If the line intended for write is marked as dirty it will be "flushed" to the lower memories before being written with

Categories : Caching

Calculating effective address translation time
Based on the data in the question, in case of address translation (virtual-to-physical), following would happen: with 0.99 probability, needed physical address would be in TLB (access time 1 ns) with 0.01 probability, needed physical address would not be in TLB, and for such cases with 0.0001 probability, page fault would happen (access time 6000000 ns) with 0.01-0.0001 = 0.0099 probability, pa

Categories : Caching

How to track Pentaho HTTPPOST soap request using fiddler
Pentaho appears to be based on Java, which doesn't always pick up the system's default proxy settings. You may need to manually configure the JVM's settings (http://docs.telerik.com/fiddler/configure-fiddler/tasks/ConfigureJavaApp) unless the tool itself offers a proxy configuration UI, e.g. http://wiki.pentaho.com/display/EAI/HTTP or http://pedroalves-bi.blogspot.com/2014/07/using-pentaho-marketp

Categories : Caching

how to efficiently cache large file in hadoop map reduce jobs?
As I see it there are three ways to handle this, and the best one depends on how your cache file will grow. If you don't expect the cache file to grow very much and that it will always fit into memory without hindering other applications or MapReduce jobs, you can put it into the HDFS cache. This feature is supported since Hadoop 2.3.0: HDFS caching lets users explicitly cache certain files

Categories : Caching

Force page to ignore Cache - ColdFusion
You can try this. <cfheader name="cache-control" value="no-cache, no-store, must-revalidate"> <cfheader name="pragma" value="no-cache"> <cfheader name="expires" value="#getHttpTimeString(now())#">

Categories : Caching

ASP.NET Session State Provider for Redis Cache and TTL
Assuming you are using : https://www.nuget.org/packages/Microsoft.Web.RedisSessionStateProvider/ There is expiry on every session in redis. If session is not used then it will be removed automatically from redis when it reaches expiry time. RedisSessionStateProvider basically sets EXPIRE (http://redis.io/commands/expire) on every session (which is equal to session timeout) every time you access

Categories : Caching

CacheOutput Attribute Ignoring Azure-hosted Redis Cache
Problem solved. I was incorrectly calling into Redis from my IApiOutputCache class. Before... public class AzureRedisApiOutputCache : IApiOutputCache { public object Get(string key) { return AzureRedisCache.Instance.GetDatabase().StringGet(key); } } After... public class AzureRedisApiOutputCache : IApiOutputCache { public object Get(string key) { // Call the extension method

Categories : Caching

How do I cache an ESI fragment and the corresponding output with Varnish 4.x by IP
I don't think there is quite enough information in the post to give you a definitive answer, but my guess is that the caching is not working properly for a reason unrelated to your ESI code. As mentioned in multiple places (here is one example), Varnish by default doesn't cache with cookies. So it very well may be that cookies set in JS or by PHP session code are causing your request to not be c

Categories : Caching

Can squid proxy's cache overflow?
I think i got the answer for my question. Squid uses LRU cache replacement policy to discard old/unused cache objects. http://www.squid-cache.org/Doc/config/cache_replacement_policy/

Categories : Caching

ehcache is not evicting element to disk
Given the answers provided to comments on the question, the most likely explanation is that you are getting evictions because the queue writing entries to disk reaches its maximum capacity. When that happens, entries that do not make it into the queue are dropped on the floor - being evicted inline of the put happening. A quick check is to make sure you do not put entries in a tight loop for test

Categories : Caching

Determining Page Table Size
You confuse the page with a page table entry: The page table consists of page table entries Each page table entry holds an address to physical memory of a page The page is a 16kB slice of memory You want to map 4GB of physical memory onto a number of 16kB pages. So you need (4*10^6 / 16*10^3) = 250 pages (adresses) Each address is held in a page table entry which is a 32-bit integer that con

Categories : Caching

ServiceStack 4: not able to add Expires Header for static content
Note: the <staticContent> xml config has no effect on Web Frameworks that provide their own static file handling functionality like ServiceStack. Static Files in ServiceStack are handled by StaticFileHandler which automatically appends HTTP Headers useful for caching Static files like the Last-Modified header which is used to send an empty 304 Not Modified Response when requests are mad

Categories : Caching

Switch between different build settings
Use different build directories for different settings: cmake -H. -B_builds/arch64 -DCMAKE_CXX_FLAGS=-m64 cmake -H. -B_builds/arch32 -DCMAKE_CXX_FLAGS=-m32 cmake -H. -B_builds/shared -DBUILD_SHARED_LIBS=ON cmake -H. -B_builds/static -DBUILD_SHARED_LIBS=OFF cmake -H. -B_builds/debug -DCMAKE_BUILD_TYPE=Debug cmake -H. -B_builds/release -DCMAKE_BUILD_TYPE=Release Exceptions Note that in each cas

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