There seems to be many errors around deleting and creating the cache files as if they are locked. As a result, many exceptions are thrown. We suspect that this is main cause of higher-than-normal memory consumption. We are also experiencing a HUGE number of connections to SQL Server 2000, we are actually maxing out the SPID's at 32,767 connections and thus causing SQL Server to fail. My initial assumption is that this is not caused by SQL but by Sharepoint issues that bleed into SQL issues. Could it be that the connections are not properly released because of these exceptions? Could it be that blobcache cannot handle high load? One other item of interest, when Blobcache is NOT enabled we do not have these problems and our production environment is running smoothly. The peak load that would hit the blobcache on production could be as high as 7000 requests per/hour per Front End Server, and I have 6 of them so we are generating close to 40,000 requests per hour. Here is an excerpt from the Sharepoint logfile. Unable to cache value for URL /PERSONAL/ADPROVIDER_2765421/SHARED PICTURES/PROFILE PICTURES/P5120076.JPG, error was System.UnauthorizedAccessException: Access to the path 'C:\BLOBCACHE\512181442\PERSONAL\ADPROVIDER_2765421\SHARED PICTURES\PROFILE PICTURES\P5120076.JPG.cache' is denied. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.File.Delete(String path) at Microsoft.SharePoint.Publishing.BlobCache.<>c__DisplayClass14.<>c__DisplayClass17.<FetchItemFromWss>b__11() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlock, FinallyBlock finallyBlock) at Microsoft.Office.Server.Diagnostics.ULS.SendWatsonOnExceptionTag(ULSTagID tagID,... /PERSONAL/ADPROVIDER_1863873/SHARED PICTURES/PROFILE PICTURES/CAFC_LOGO.GIF, error was System.ApplicationException: Attempt to release mutex not owned by caller. (Exception from HRESULT: 0x00000120) at System.Threading.ReaderWriterLock.ReleaseReaderLockInternal() at Microsoft.SharePoint.Publishing.BlobCache.GetListMetaData(SPList list) at Microsoft.SharePoint.Publishing.BlobCacheEntry.CreateCacheEntry(String localPath, SPListItem item, SPFileVersion version, BlobCache cache) at Microsoft.SharePoint.Publishing.BlobCache.<>c__DisplayClass14.<>c__DisplayClass17.<FetchItemFromWss>b__11() at Microsoft.Office.Server.Diagnostics.FirstChanceHandler.ExceptionFilter(Boolean fRethrowException, TryBlock tryBlock, FilterBlock filter, CatchBlock catchBlo... Thank you in Advance for any assistance you can provide.CheersCHS

Hi, Please have a look at this KB, it may help : http://support.microsoft.com/kb/2015895 Regards, Djamel Chagour http://spbyexamples.blogspot.com/ http://mosslogviewer.codeplex.com/