Hi All,
We migrated from v7.5 on a 32 bit Windows Server to v9.1 on a 64 bit Windows server. We use Server Jobs Only
Post Migration we are having performance degradation in the newer version by almost 40% while I understand a 10% down performance can be expected due to the way Authentication works.
** No Code Changes made during upgrade **
We have done a lot of testing but have not been able to figure out why the same job in 9.1 is so slow compared to 7.5. Have raised a support request with IBM but that is not helping!!!!!
We use a lot of Hashed Files and currently both version have the variable 64BIT_FILES = 0 in the UVCONFIG file. Any chance changing this 64BIT_FILES = 1 in the v9.1 to use 64 bit Hash files instead of 32-bit could help in performance?
Thanks,
NV
64-bit Hash Files
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Almost definitely not. 64-bit hashed files use 64-bit internal pointers, so take up more space on disk. Otherwise the access mechanism is identical to that for 32-bit hashed files (possibly with more seek activity within the file, which would actually make performance worse).
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Any contribution to this forum is my own opinion and does not necessarily reflect any position that IBM may hold.
Any contribution to this forum is my own opinion and does not necessarily reflect any position that IBM may hold.