When the number of logical CPUs for a Windows host is more than 32, Database startup hangs

Source: Internet
Author: User
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Bug 9772171-database startup hangs on Windows if machine had more than cores [9772171.8]

Using a specific version of Oracle DB (specifically standalone, non-RAC) under Windows, if Windows has more than 32 logical CPUs, Oracle DB may not start up, or the DB will have an exception: memory overflow, and so on.
If this is the case, then basically hit a bug,

The bug is: Bug 9772171-database startup hangs on Windows time machine have more than cores [9772171.8]

The impact of this bug is:

Product (Component) Oracle Server (Rdbms)
Range of versions believed to be affected Versions BELOW 12.1
Versions confirmed as being affected
  • 11.2.0.1
  • 11.1.0.7
  • 10.2.0.4
Platforms affected
  • Windows 64bit (AMD64/EM64T)
  • Windows/nt/xp


In the following version, the bug was resolved:

This issue is a fixed in
  • 12.1.0.1 (Base Release)
  • 11.2.0.2 (Server Patch Set)
  • 11.2.0.1 Patch 5 on Windows platforms
  • 11.1.0.7 Patch on Windows platforms
  • 10.2.0.5 Patch on Windows platforms
  • 10.2.0.4 Patch on Windows platforms


Today in an environment under Windows 11.2.0.1 (x64) to 11.2.0.4 (x64) upgrade, the machine has 64 logical CPUs, just 11.2.0.1 version of Oracle DB cannot use so many CPUs,
As a result, only 32 logical CPUs are set up from the bios of the host. When the 11.2.0.4 upgrade is complete, when the OS is restarted, it is set to 64 logical CPUs from inside the BIOS, after which the Oracle 11.2.0.4 database is successfully started.
So the problem was solved smoothly.

When the number of logical CPUs for a Windows host is more than 32, Database startup hangs

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