I have an application build in ColdFusion MVC framework "Mach-II" and hosted on blue dragon ColdFusion server.
It causes caching issue. When i added a new page with some contents and load the page than it's working fine. But when i made some changes in the same file and hit it again its not update my changes. Its always showing me the content that i have made in the very first time. Its seems like that the server is caching my page and did not consider further changes. I have tried many solutions but failed to solve the problem.
Please let me know if you have any solution for that.
This is a bit too long for a comment - but it's not much of an answer.
First off, your question is quite broad for StackOverflow. If you aren't looking at the code yourself, and have nothing to show us, there is no guarantee we can help you at all.
It sounds like maybe this service is using query caching - which looks something like this.
<cfquery datasource="CRM" name="testQuery" cachedwithin="#CreateTimeSpan(0,0,30,0)#">
-SQL logic-
</cfquery>
Basically it stores a query's result in memory on the server. It can really help reduce strain on the database. It's possible that they've set a time limit on this caching feature that's longer than you'd like.
If you don't have access to the code, THIS is the issue you want to ask about first.
Edit: It may be entirely different.
https://docs.oracle.com/cd/E13176_01/bluedragon/621/BlueDragon_621_WL_User_Guide.html#_Toc121303111
From source:
Where ColdFusion (5 and MX) defines a ‘template cache” as a place to
holds templates in memory once rendered from source code, BlueDragon
has the same notion but refers to this as the “file cache”. In both
engines, a template once rendered from source will remain in the cache
until the server (or J2EE or .NET web app) is restarted.
The cache size, specified in the Admin Console, indicates how many of
these cached templates to keep. It defaults to 60 but that number may
need to change for your application, depending on how many CFML
templates your application uses. One entry is used for each template
(CFM or CFC file) requested.
It’s very important to understand that this is not caching the OUTPUT
of the page but rather the rendering of the template from source into
its internal objects. One cached instance of the template is shared
among all users in the application.
As in ColdFusion, once the file cache is full (for instance, you set
it to 60 and 60 templates have been requested), then the next request
for a template not yet cached will force the engine to flush the
oldest (least recently used) entry in the cache to make room.
Naturally, if you set this file cache size too low, thrashing in the
cache could occur as room is made for files only to soon have the
flushed file requested again.
It sounds like you might have to either restart the ColdFusion application or clear the Template Cache in the CFAdmin.
Related
I'm looking at the cache function in the findAll function of cfWheels. I'm a little apprehensive about using it. My queries are not taking that long that I absolutely need them, but a bit of a speed boost is always welcome. I'm getting 10ms from a queried cache that otherwise takes about 100ms. The thing I'm wondering about is when an entry changes, I'd like the cache to be cleared on the next run. It doesn't seem like there's any mechanism or flag in the framework that would allow that, so I'd have to set and clear the flags myself, which would most likely end up having to read from the database anyway. I was hoping that I could set the cache for a full day and update when needed, is this horribly misguided? I'm most likely not going to go down the road of developing any of the functionality to allow the caching for this application, but am curious if it is worth while revisiting.
More precisely whenever you make a new entry in the database, use the cfhttp tag to reload the application.
Caching can be cleared through reloading an application. It would not be the answer you are seeking but is a solution, here is an another approach. You can reload an application through <CFHTTP> by sending URL through <CFHTTP> after adding your new database record. If you are adding record through management site, then you can reload your Public site using <cfhttp>.
:)
Okay, so I have an old ASP Classic website. I've determined I can reduce a huge number of DB calls by caching the data daily. Our site data is read only, and changes very slowly. I think based on our site usage, I would be able to cache pages by query string for every visit each day, without a hit to our server.
My first thought was to use Output Caching, but the problem I discovered right away was that it wasn't until the third page request was generated that I gained any performance. I verified this using SQL profiler, but I'm not sure why.
My second thought was to add this ObjPageCache include file from https://web.archive.org/web/20211020131054/https://www.4guysfromrolla.com/webtech/032002-1.shtml After some research I discovered that this could cause more issues than it may solve http://support.microsoft.com/kb/316451
I'm hoping someone on here will tell me that since 2002 the issue with Sending ServerXMLHTTP or WinHTTP Requests to the Same Server has been resolved with Microsoft.
Depending on how your data is maintained you could choose from a number of ways to cache it.
If your data is changed and saved in one single place you could choose to generate an html-file which you save to the serverdisk and refer to in your linking. This will require write access for the process running your site though (e.g. NETWORK SERVICE). This will produce fast pages as the server serves these pages without any scriptingengine getting involved.
Another option is reading the data into an DomDocument which you store in the Application object and refer to on the page that needs it (hence saving the roundtrip to the database). You could keep two timestamps together with the cached data (one for the cachingtime and one for the time of change of data in the database). Timestamps will allow for fast check for staleness of the cached data: cached timestamp <> database timestamp => refresh data; otherwise use cached data. One thing to note about this approach is that Application does not accept objects other than multithreaded object so you will have to use the MSXML2.FreeThreadedDomDocument.6.0
Personally I prefer the last one as it allows for a more dynamic usage and I don't have to worry about write access permissions for the process running my site (which would probably pose security risks anyways).
I'm dealing with some loading speed issues on a ModX Revolution (2.2.2-pl) installation. I believe the problem is rooted in the fact that hundreds of sites are hosted and accessible from the same administrator window, but unfortunately I don't have a say in that setup.
It seems that the ajax calls are puttering - fully loading the sidebar takes about 10 seconds, and saving takes about 15 seconds.
I was dabbling in some database stuff recently and came across some information on indexing. Space on the server is not a big concern, so is there something in the database I could index to speed up these calls?
Have you looked into the javascript & css options, limits in the system settings?
The newest versions of modx are continue improving in speed [i.e. keep it updated to the latest]
Browsers will make a difference as well, I find Chrome is the fastest ~ I'm assuming it has the fastest javascript engine.
Other than that you should be able to customize the manager in such a way that you have a different administrative login for each context [each website] by creating admin users that only have access to each given context. You should be able to get lots of help for that one in the modx forums.
*EDIT***
There are several options in the manager that you can tweak/enable/disable that may help:
- Use Compressed CSS
- Use Compressed JavaScript Libraries
- Use Grouping When Compressing Javascript
- Maximum JavaScript Files Compressed
- Manager JS/CSS Compression Cache Age
Though most of these will already be 'optimized'
I think there is a way to disable the resource browser refreshing when you save as well, but I can't seem to find it now.
If your administration has already been restricted to different contexts I don't think you should even be able to see a resource that is not in the context you have access to. i.e. if you can still see other resources, then you still have ~some~ sort of access. It sounds to me like your problem is the time it takes for the resource browser to redraw, not the actual time it takes the server to process it [right?]
What version of Modx Revo are you using? There have been alot of recent performance improvements in past few releases.
Related Post
I have an application that was built using Fusebox 4 with ColdFusion. Can anyone recommend a good caching solution, that is a plugin, which works directly with this older version of the framework?
Another idea I've been tinkering around with is to take the most commonly used queries in the system and applying cachedWithin. The value would be a variable stored in the application scope. Basically anytime we update any of the most commonly accessed tables in the db, we update the application.cachedwithin variable as well. So whenever these tables are updated the data is refreshed. Anything else that isn't used frequently will simply query the DB to get the content.
Also to add to this very simple caching methodology would be to simply store strings, or other frequently used content, directly within the application scope.
This bulk of this application is around 30 pages, comprised of approximately 200 products. So its quite a small website.
Can anyone recommend a good Fusebox 4 cache plugin or confirm if this simple caching methodology is a good idea? If not, could you recommend a simple alternative?
thanks in advance
I would suggest you to use cfcache to store all pages output into statistics HTML files.
Then on any update, you can clear the cache of the updated pages or all the cache:
<cfcache action="flush" />
<cfobjectcache action="clear" />
make sure to disable the urlSessionFormat() in URL.
I'm not sure that you even need to be caching given the size of the site, unless you are getting a huge amount of traffic. If you are currently having performance problems, the first thing to do is make sure that Fusebox is in production mode, so that it isn't recreating the parsed files on each request.
Caching the queries should certainly aid performance - how long are the queries currently taking to execute? With Fusebox 4, it can be problematic to have "Report execution times" turned on in CF when debugging, as it can significantly affect the time the request takes to execute.
I have developed application using ZF.The app is little big with a lots of features.
I use Zend_Application(already using autoloader in constructor),Zend_Layout,Zend_view,Zend_form,etc. My current issue is, the page loading is very slow and that too in localhost with XAMP.
I have enabled xdebug, to investigate the issue, got a cachegrind file in "tmp" folder and tried to view it with WinCachegrind software. There i can a see a lot of processes and functions being run for each and every request or page load.
Also, i have installed YSlow add-on for firefox and observed the speed of page loads in seconds...I have compare the speed with ZF and non ZF applications. And from the comparison, the pages for non zf app takes less than 1 sec to load and for the ZF app, it takes atleast 6-7 seconds. What a huge difference.
Main Things happen in the app are :
1) Database connection happens for each request.
2) Im not adding the view to layout explicitly,ZF just appends it automatically, to layout.phtml, based on the action name.
3) Some windows have forms with few drop down boxes which fetches data from the database.
4) Have menus with ACL implimented, before it was loading the privilges from DB for each and every request, but now i have optimized it, so that it will work only duiring the login and rest of the time it will take from the Zend_Registry.
I would like to attach the cachegrind file so that some one can see whats happening in the background, but i cant see an option here for attaching.
Someone please help me to find a solution for this. Any kind of help is really appreciated. Thanks a lot
Let's try to give some hints.
First database connection should happen only once (except if you use several privileges access on the database or several databases). So check that you use Singleton patterns with you Zend_Db_Tables object
Then you do not use Zend_Cache. You should really start to use Zend_Cache and build several cache objects. Let's say for example a File cach, with long term storage, and a memcache or Apc Cache, storing objects. Then use these cache in several layers:
gives the FileCache to Zend_Db_Table (defaultMetaDataCache), this way you will avoid a loot of metadata queries, queries that ask for description of each columns of the tables you use.
Store one or more Acl object (depends on how you use Acl, if you have one big Acl with all rules or several with subsets). And store them in mid-duration caches when they are built.
Think of other usages, detect heavy loops, semi-static contents (like you select lists, how many time should they be considered static?)
Finally, get a whole mental image of how your application engine works, and how your data will grow and be used.You will need that step to use application levels caches in the very best way (for example should some elements be cached for groups of users?, should Acl objects be build for groups, for each user, for everybody, is ther some blocks in the layout that should be rendered the same for everybody?).