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  • maurice 8 posts 57 karma points
    Jun 09, 2015 @ 11:56
    maurice
    0

    Slow load time with 6.0.7

    Hi,

    having Umbraco 6.0.7 running on our production server, we are experiencing very slow startup times when recycling the application pool. While the Umbraco backend is available (but very slow) just after startup, it takes up to 5 minutes or even longer before the frontend web site is available. The startup log looks like that:

    2015-06-08 22:26:42,646 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application starting
    2015-06-08 22:26:42,659 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Determining hash of code files on disk
    2015-06-08 22:26:42,665 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Hash determined (took 7ms)
    2015-06-08 22:26:42,900 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplicationStartupHandler, found 31 (took 229ms)
    2015-06-08 22:26:42,915 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Models.IMacroPropertyType, found 0 (took 6ms)
    2015-06-08 22:26:42,924 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.PropertyEditors.IPropertyEditorValueConverter, found 0 (took 8ms)
    2015-06-08 22:26:42,932 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Web.Mvc.SurfaceController, found 1 (took 7ms)
    2015-06-08 22:26:42,944 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IThumbnailProvider, found 3 (took 10ms)
    2015-06-08 22:26:42,954 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IImageUrlProvider, found 1 (took 9ms)
    2015-06-08 22:26:42,998 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application startup complete (took 352ms)
    2015-06-08 22:26:43,189 [7] INFO  XDataService - [Thread 1] Indexing RedsysFilm
    2015-06-08 22:26:50,961 [7] INFO  XDataService - [Thread 1] Indexing RedsysReihe
    2015-06-08 22:26:52,720 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplication, found 7 (took 17ms)
    2015-06-08 22:26:52,809 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.ITree, found 27 (took 72ms)
    2015-06-08 22:26:52,822 [7] INFO  umbraco.BusinessLogic.Log - [Thread 13] Redirected log call (please use Umbraco.Core.Logging.LogHelper instead of umbraco.BusinessLogic.Log) | Type: Custom | User: 0 | NodeId: -1 | Comment: [UmbracoExamine] Adding examine event handlers for index providers: 6
    2015-06-08 22:26:53,579 [7] INFO  umbraco.content - [Thread 13] Loading content from disk cache...
    2015-06-08 22:26:54,193 [7] INFO  Umbraco.Core.PluginManager - [Thread 13] Completed resolution of types of umbraco.interfaces.IDataType, found 81 (took 104ms)
    2015-06-08 22:26:54,270 [7] INFO  Umbraco.Core.PluginManager - [Thread 13] Completed resolution of types of umbraco.interfaces.ITree, found 50 (took 71ms)
    2015-06-08 22:27:23,733 [7] WARN  Umbraco.Web.Routing.NiceUrlProvider - [Thread 27] Couldn't find any page with nodeId=2740. This is most likely caused by the page not being published.
    2015-06-08 22:27:23,734 [7] WARN  Umbraco.Web.Routing.NiceUrlProvider - [Thread 27] Couldn't find any page with nodeId=2740. This is most likely caused by the page not being published.
    2015-06-08 22:27:23,734 [7] WARN  Umbraco.Web.Routing.NiceUrlProvider - [Thread 27] Couldn't find any page with nodeId=2740. This is most likely caused by the page not being published.
    2015-06-08 22:27:23,734 [7] WARN  Umbraco.Web.Routing.NiceUrlProvider - [Thread 27] Couldn't find any page with nodeId=2740. This is most likely caused by the page not being published.
    2015-06-08 22:29:34,426 [7] INFO  umbraco.BasePages.BasePage - [Thread 25] User X (Id: 0) logged in
    2015-06-08 22:29:34,621 [7] INFO  Umbraco.Core.PluginManager - [Thread 34] Completed resolution of types of umbraco.BusinessLogic.Actions.IActionHandler, found 1 (took 8ms)
    2015-06-08 22:36:23,778 [7] INFO  umbraco.BasePages.BasePage - [Thread 31] User Y (Id: 2) logged in

    Sometimes even OutOfMemoryExceptions are thrown shortly after an application pool recycle, while memory consumption is quite normal at other times:

    2015-06-08 21:37:47,297 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application starting
    2015-06-08 21:37:47,310 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Determining hash of code files on disk
    2015-06-08 21:37:47,318 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Hash determined (took 7ms)
    2015-06-08 21:37:47,541 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplicationStartupHandler, found 31 (took 217ms)
    2015-06-08 21:37:47,555 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Models.IMacroPropertyType, found 0 (took 5ms)
    2015-06-08 21:37:47,563 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.PropertyEditors.IPropertyEditorValueConverter, found 0 (took 7ms)
    2015-06-08 21:37:47,571 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Web.Mvc.SurfaceController, found 1 (took 7ms)
    2015-06-08 21:37:47,583 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IThumbnailProvider, found 3 (took 9ms)
    2015-06-08 21:37:47,593 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IImageUrlProvider, found 1 (took 9ms)
    2015-06-08 21:37:47,636 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application startup complete (took 338ms)
    2015-06-08 21:37:47,791 [7] INFO  XDataService - [Thread 1] Indexing RedsysFilm
    2015-06-08 21:37:55,689 [7] INFO  XDataService - [Thread 1] Indexing RedsysReihe
    2015-06-08 21:37:57,382 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplication, found 7 (took 17ms)
    2015-06-08 21:37:57,471 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.ITree, found 27 (took 72ms)
    2015-06-08 21:37:57,481 [7] INFO  umbraco.BusinessLogic.Log - [Thread 14] Redirected log call (please use Umbraco.Core.Logging.LogHelper instead of umbraco.BusinessLogic.Log) | Type: Custom | User: 0 | NodeId: -1 | Comment: [UmbracoExamine] Adding examine event handlers for index providers: 6
    2015-06-08 21:37:57,984 [7] INFO  umbraco.content - [Thread 12] Loading content from disk cache...
    2015-06-08 21:38:18,422 [7] INFO  umbraco.BasePages.BasePage - [Thread 34] User X (Id: 0) logged in
    2015-06-08 22:07:43,879 [7] ERROR Umbraco.Core.UmbracoApplicationBase - [Thread 975] An unhandled exception occurred
    System.OutOfMemoryException: Eine Ausnahme vom Typ "System.OutOfMemoryException" wurde ausgelöst.
       bei System.Reflection.Emit.ILGenerator.BakeByteArray()
       bei System.Reflection.Emit.DynamicResolver..ctor(DynamicILGenerator ilGenerator)
       bei System.Reflection.Emit.DynamicILGenerator.GetCallableMethod(RuntimeModule module, DynamicMethod dm)
       bei System.Reflection.Emit.DynamicMethod.GetMethodDescriptor()
       bei System.Reflection.Emit.DynamicMethod.CreateDelegate(Type delegateType)
       bei System.Text.RegularExpressions.CompiledRegexRunnerFactory.CreateInstance()
       bei System.Text.RegularExpressions.Regex.Run(Boolean quick, Int32 prevlen, String input, Int32 beginning, Int32 length, Int32 startat)
       bei System.Text.RegularExpressions.Regex.IsMatch(String input, Int32 startat)
       bei System.Text.RegularExpressions.Regex.IsMatch(String input)
       bei UrlRewritingNet.Web.RegExRewriteRule.IsRewrite(String requestUrl)
       bei UrlRewritingNet.Web.UrlRewriteModule.RedirectUrl(HttpApplication app)
       bei UrlRewritingNet.Web.UrlRewriteModule.OnBeginRequest(Object sender, EventArgs e)
       bei System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
       bei System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

    The web server process then consumes more than 2 GB of memory and the web site is not responding anymore.

    Is there anyone having a hint for us where to look for the reasons for the above?

    Regards,
    Maurice

  • Alex Skrypnyk 6150 posts 24110 karma points MVP 8x admin c-trib
    Jun 11, 2015 @ 09:42
    Alex Skrypnyk
    0

    hi Maurice,

    How many nodes do you have ?

    Did you turn off debug ?

    Did you use miniprofiler?

    Thanks,

    Alex

  • maurice 8 posts 57 karma points
    Jun 11, 2015 @ 11:33
    maurice
    0

    Hi Alex,

    thanks for your reply. There are 6.000 published nodes out of 10.000 in total. Debug is turned off. It seems that the startup is slow/stuck in times of high traffic, when there are lots of visitors. In case the app pool hangs, the log ends with the message "Loading content from disk cache...":

    2015-06-11 05:01:29,943 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application starting
    2015-06-11 05:01:29,957 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Determining hash of code files on disk
    2015-06-11 05:01:29,965 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Hash determined (took 7ms)
    2015-06-11 05:01:30,187 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplicationStartupHandler, found 31 (took 216ms)
    2015-06-11 05:01:30,202 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Models.IMacroPropertyType, found 0 (took 5ms)
    2015-06-11 05:01:30,209 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.PropertyEditors.IPropertyEditorValueConverter, found 0 (took 7ms)
    2015-06-11 05:01:30,217 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Web.Mvc.SurfaceController, found 1 (took 7ms)
    2015-06-11 05:01:30,228 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IThumbnailProvider, found 3 (took 9ms)
    2015-06-11 05:01:30,238 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of Umbraco.Core.Media.IImageUrlProvider, found 1 (took 9ms)
    2015-06-11 05:01:30,280 [7] INFO  Umbraco.Core.CoreBootManager - [Thread 1] Umbraco application startup complete (took 336ms)
    2015-06-11 05:01:30,432 [7] INFO  FilmDataService - [Thread 1] Indexing RedsysFilm
    2015-06-11 05:01:37,777 [7] INFO  ReiheDataService - [Thread 1] Indexing RedsysReihe
    2015-06-11 05:01:39,592 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.IApplication, found 7 (took 22ms)
    2015-06-11 05:01:39,684 [7] INFO  Umbraco.Core.PluginManager - [Thread 1] Completed resolution of types of umbraco.interfaces.ITree, found 27 (took 74ms)
    2015-06-11 05:01:39,693 [7] INFO  umbraco.BusinessLogic.Log - [Thread 10] Redirected log call (please use Umbraco.Core.Logging.LogHelper instead of umbraco.BusinessLogic.Log) | Type: Custom | User: 0 | NodeId: -1 | Comment: [UmbracoExamine] Adding examine event handlers for index providers: 6
    2015-06-11 05:01:40,282 [7] INFO  umbraco.content - [Thread 10] Loading content from disk cache...
    

    When we're lucky and the app pool starts normally, the log continues with the following messages:

    2015-06-11 05:01:40,975 [7] INFO  Umbraco.Core.PluginManager - [Thread 10] Completed resolution of types of umbraco.interfaces.IDataType, found 81 (took 114ms)
    2015-06-11 05:01:41,062 [7] INFO  Umbraco.Core.PluginManager - [Thread 10] Completed resolution of types of umbraco.interfaces.ITree, found 50 (took 81ms)
    

    On a test server we didn't have any problems like that so far. So maybe it has something to do with incoming requests while Umbraco is starting up?

    Regards, Maurice

  • Emil Rasmussen 67 posts 91 karma points
    Jun 11, 2015 @ 11:38
    Emil Rasmussen
    0

    We are experiencing the exact same symptoms on the high traffic/lots of content sites we have. I must admit that we have just accepted it as a fact of life :(

    Best regards Emil

  • Alex Skrypnyk 6150 posts 24110 karma points MVP 8x admin c-trib
    Jun 11, 2015 @ 11:48
    Alex Skrypnyk
    0

    You can turn off XmlCacheEnabled, and use memory cache more and more, it can solve loading content from the disk cache.

    I think disk cache isn't perfect for large sites.

    Thanks,

    Alex

  • maurice 8 posts 57 karma points
    Jun 11, 2015 @ 13:08
    maurice
    0

    Thanks Alex,

    that sounds promising. However, on https://our.umbraco.org/documentation/Using-Umbraco/Config-files/umbracoSettings/ they say the following:

    You should not in any way turn this off, unless you have a very good reason to do so. It will make your website very slow.

    On https://groups.google.com/forum/#!msg/umbraco-dev/Spw1bDYhuEo/LOYZ2zYnkMUJ however it reads:

    With the XmlCacheEnabled and ContinouslyUpdateXmlDiskCache turned off we very rarely get the locking issue.

    So we'll try your suggestion on our test server and will let you know the results.

    Kind regards, Maurice

  • Emil Rasmussen 67 posts 91 karma points
    Jun 11, 2015 @ 13:14
    Emil Rasmussen
    0

    My understanding of the XmlCacheEnabled setting is that it disabled any caching, and goes directly the database.

    We have XmlCacheEnabled = false in development, as the developers share the same database. This avoids re-publishing of nodes that other developers have edited, to update the umbraco.config xml cache.

    Best regards Emil

  • Alex Skrypnyk 6150 posts 24110 karma points MVP 8x admin c-trib
    Jun 11, 2015 @ 13:58
    Alex Skrypnyk
    0

    It makes sense turn off XmlCache if you will make great performance fixes in your code, and if you have great server with perfect connection between app and sql server.

    Thanks, Alex

  • maurice 8 posts 57 karma points
    Jun 15, 2015 @ 11:20
    maurice
    0

    We've checked the XmlCache settings on our test server and it helped reducing the server response time as well as memory usage. Instead of 2 GB the web server process consumed just 300-500 MB while running the exact same test procedure. So thanks a lot for that suggestion, Alex! =)

    We've discovered another issue with the home page, regardless of the XmlCache setting being enabled or disabled: When calling the extension method IPublishedContent.Descendants(String), the call takes about 1 second with IPublishedContent being the root node of the website. The same call takes only 100ms when IPublishedContent is any of the root's sub-nodes. We've replaced that call, so that's no problem anymore.

    Regarding the hangs on app pool start-up: It might be related to an exception that is silently thrown in an ISimpleDataService, but we are not sure about that yet. We'll have to update the production server and have a look at that issue again.

  • Alex Skrypnyk 6150 posts 24110 karma points MVP 8x admin c-trib
    Jun 16, 2015 @ 09:11
    Alex Skrypnyk
    0

    Hi Maurice,

    I'm glad that our advice helped you, also can you avoid IPublishedContent.Descendants(String) method? It's really heavy.

    Thanks

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