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Memory limits on blob reading? |
Tue, Mar 9 2010 4:09 AM | Permanent Link |
Matthew Jones | Are there any memory limits on blob reading, particularly that would give trouble
when multiple threads are reading the same record? There is plenty of memory available, and little in use, so it is likely to be something other than actual memory limits. exception class : EOutOfMemory 005a92dc +020 MyApp.exe dbisamlb ResizeBuffer 00583902 +012 MyApp.exe dbisamen TBlobBuffer.SetSize 0057839f +0df MyApp.exe dbisamen TDataCursor.ReadBlob 00577fb8 +3a4 MyApp.exe dbisamen TDataCursor.OpenBlob 005e57bd +12d MyApp.exe dbisamtb TDBISAMBlobStream.Create 005d9b41 +01d MyApp.exe dbisamtb TDBISAMDataSet.CreateBlobStream 004ff83a +012 MyApp.exe DB TBlobField.GetAsString 00960a22 +082 MyApp.exe dFileStore TdmFileStore.GetFileContents The app overall is using 155187360 bytes on a 3Gb PC. /Matthew Jones/ |
Tue, Mar 9 2010 1:13 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | Matthew,
<< Are there any memory limits on blob reading, particularly that would give trouble when multiple threads are reading the same record? >> No. The problem could be related to several things: 1) Severe memory fragmentation (possible with older Delphi memory managers, but unlikely with FastMM4). 2) Corruption - the BLOB size in the table record is invalid, causing the memory manager to try and allocate a block of memory that is very large or a negative number. Does the table check out using VerifyTable ? -- Tim Young Elevate Software www.elevatesoft.com |
Wed, Mar 10 2010 4:29 AM | Permanent Link |
Matthew Jones | > Does the table check out using VerifyTable ?
I will find out. The service verifies on startup, so should be logged. /Matthew Jones/ |
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