WARNING:Could not lower the asynch I/O limit to 1056 for SQL direct I/O.

Hi ,
I am getting below warnings in the user dump after upgrading to 10.2.0.5 from 9.2.0.1 on windows server (32 bit)
WARNING:Could not lower the asynch I/O limit to 1056 for SQL direct I/O. It is set to -1
Kindly let me know as to why these warnings are generated in the user dump.
SQL> show parameter synch
NAME TYPE VALUE
disk_asynch_io boolean TRUE
tape_asynch_io boolean TRUE
Thanks,
Sachin

Welcome to the forums !
This seems to be a known issue - pl see these MOS Docs
https://supporthtml.oracle.com/ep/faces/secure/km/BugDisplay.jspx?id=9772888&bugProductSource=Oracle
9772888.8 - Bug 9772888 - "WARNING:Could not lower the asynch I/O ... It is set to -1" messages
Seems to be fixed on 11.2.0.2 (or 10.2.0.5 patch 1 for Windows - see MOS Doc 342443.1 (10.2.0.x Oracle Database and Networking Patches for Microsoft Platforms))
Pl open an SR with Support to verify if this is a cause for concern, as it is not clear from these docs whether this causes any corruption
HTH
Srini

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