llong
Posts:96
| | 09/27/2007 3:44 PM |
| I don't know. I get a fair amount of traffic. How would I test?
Thank you for the new version. I will test it now. | | | |
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John Mitchell
Posts:3238
| | 09/27/2007 3:51 PM |
| Sorry for the confusion, it's not really something that needs testing. It is a normal occurence when traffic is high for ASP.Net to initialize another http application. I was just thinking out loud about why you would see that error in your event log.
Unfortunately it doesn't get you any closer to figuring out why you are getting a "hang" at 100% cpu, but I think the search indexer is the most likely culprit there. | | | |
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llong
Posts:96
| | 09/28/2007 2:31 PM |
| [duplicate] | | | |
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llong
Posts:96
| | 09/28/2007 2:35 PM |
| John,
I have replace the DLL and turned the search engine off completely. Still getting 100% CPU for hours at a time.
This morning I captured output from Process Monitor showing line after line of pageblaster entires like those above. Can I send you this file? I highly value your product so it is important I getting it working. | | | |
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John Mitchell
Posts:3238
| | 09/28/2007 2:37 PM |
| Sure, you can send the file to support AT snapsis DOT com
Have you created any Regex replacement rules? That is the only thing I know of that might cause High CPU usage for an extended period.
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llong
Posts:96
| | 10/01/2007 12:09 PM |
| John,
I have removed all but the google and legal rules from the list I sent in the email. Still had an "episode" this morning and last night but only 20 and 15 minutes long. That could be because I'm recycling the app pool every 2 hours now.
Lance | | | |
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llong
Posts:96
| | 10/02/2007 7:39 PM |
| John,
Would throttling the cache rebuild work? I could live with the cache being rebuilt over many hours with each page spaced apart by a few seconds. Would this not allow heavier regex and plug-in filters per page? Of course requests with no cache would take precedence but the scheduled refresh of the pages could occur slower. | | | |
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llong
Posts:96
| | 10/05/2007 2:05 PM |
| John?
Have I annoyed you? | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:10 PM |
| Sorry, I thought I had replied already.
The page cache for PageBlaster is only built on the first request of a page, and that is only if a page is not already in memory or on disk.
If you have some high traffic pages that are expiring quickly then you may want to extend the disk cache time to help stretch out processing.
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llong
Posts:96
| | 10/05/2007 2:20 PM |
| Hi.
I have the disk cache time set to 4 days.
I did a little snooping on the process monitor report. I found that over a 4 minute period (where the CPU was 100%) 30% of the requests were open file commands by Snapsis like this one:
39:38.7 QueryOpen D:\virtuals\legal-design_com\dotnetnuke\Web\DesktopModules\Snapsis\PageBlaster\Cache\tabid\1234\4a5fd40cdeede6748896bff3b2423440.pb.webinfo CreationTime: 10/2/2007 6:53:54 PM, LastAccessTime: 10/3/2007 12:24:33 AM, LastWriteTime: 10/2/2007 6:53:54 PM, ChangeTime: 10/2/2007 6:53:54 PM, AllocationSize: 8,192, EndOfFile: 6,921, FileAttributes: A SUCCESS
I had 17,479 entires like this in 4 minutes. Not all the time, only when it's acting up. The site runs fine and quite quickly for the rest of the day. | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:26 PM |
| That may be happening when PageBlaster does a Cleanup to purge expired disk cache files. This should only happen on restart, and once every 24 hours after a restart.
Do me a favor and check to see how many files you currently have in the PageBlaster disk cache folder. | | | |
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llong
Posts:96
| | 10/05/2007 2:28 PM |
| To round off the info;
15% of the entries are query directory:
37:29.9 QueryDirectory D:\virtuals\legal-design_com\dotnetnuke\Web\DesktopModules\Snapsis\PageBlaster\Cache\tabid\1074 0: .., 1: 82645a5217966dcdbc5f2feb000fe5b1.pb.webinfo, 2: a8e42807e980b762c0a6cf360e605455.pb.webinfo, 3: fa97b4d0eeb98df3edc55d80c719e6c7.pb.webinfo SUCCESS Read Metadata
15% are create files:
39:37.2 CreateFile D:\virtuals\legal-design_com\dotnetnuke\Web\DesktopModules\Snapsis\PageBlaster\Cache\tabid\1228 Desired Access: Read Data/List Directory, Synchronize, Disposition: Open, Options: Directory, Synchronous IO Non-Alert, Attributes: n/a, ShareMode: Read, Write, Delete, AllocationSize: n/a, OpenResult: Opened SUCCESS
and the rest are mixed plus a few non snapsis entires | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:33 PM |
| It looks like those are folder reads and file opens. PageBlaster has to open the file to determine the expiration time.
Also, if the Snapsis.PageBlaster.config file is updated then this clean up process will kick off. | | | |
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llong
Posts:96
| | 10/05/2007 2:34 PM |
| | Cache folder is 45mb and contains 4,105 files. | | | |
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llong
Posts:96
| | 10/05/2007 2:39 PM |
| ok, so questions are:
a) how do I schedule it to only run at, say, 2am. I can trust the application restarts to always be at the same time.
b) how can i throttle it to not try and replace 4000 files all at once. | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:42 PM |
| Ok, maybe I should throttle the cleanup task. I'll look into running that in a seperate thread and slowing it down.
If you decrease the disk expiration to 2 days it should help also since there should be less files in the cache folder.
Although if you have a daily spider indexing your whole site then that may not help. | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:48 PM |
| It doesn't actually try and replace all the files that are expired at the same time. It waits for the next page request to recreate a cache item. This keeps seldom used pages from remaining in the cache.
I can see where opening 4000 files in quick succession and reading them would cause a CPU spike though, so I do need to modify that task. | | | |
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llong
Posts:96
| | 10/05/2007 2:51 PM |
| Yes, google and others seem to hit every page about once a day.
Can I somehow turn the process off until then? Since it rebuilds if expired, the check seems redundant. | | | |
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John Mitchell
Posts:3238
| | 10/05/2007 2:57 PM |
| | Send me an e-mail, and I can build you a new DLL that has this disabled [ PageBlaster AT Snapsis DOT com ] | | | |
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llong
Posts:96
| | 10/05/2007 3:30 PM |
| sent. Thank you!
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