Bug 46252

Bug: 46252

Impact:

Critical

Product:

GemStone/S 64 Bit

Versions:

3.3.3, 3.3.2, 3.3.1, 3.3, 3.2.15, 3.2.14, 3.2.13, 3.2.12, 3.2.11, 3.2.10, 3.2.9, 3.2.8, 3.2.7, 3.2.6, 3.2.5, 3.2.4, 3.2.3, 3.2.2, 3.2.1, 3.2, 3.1.0.6, 3.1.0.5, 3.1.0.4, 3.1.0.3, 3.1.0.2, 3.1.0.1, 3.1, 3.0.1, 3.0

Platform:

All Platforms

Fixed In:

3.3.4, 3.2.16

Operations may hang when oopHighWaterMark over 4 billion

In very large repositories with a oop high water mark greater than 4 billion, operations that scan oops over the entire repository may hang and run hot.

You can determine your oop high water mark by executing

   System _oopNumber oopNumberHighWaterMark.

or by checking the stone startup information in the stone log:

    Repository startup statistics:
        Pages Need Reclaiming =XXXXX
        Free Oops=XXXXX
        Oop Number High Water Mark=XXXXXXXX

The affected operations includes:
  MFC and subsequent processing such as write set union sweep
  restore from backup
  object audit
  list instances
  count instances
  find object

To diagnose this problem, take a stack trace (using either gdb/dbx or "kill -USR1") of the hanging gem.  This will include, in the C stack:
    UtlFindFirstBitSet

Most cases of this bug are fixed in 3.3.1 and later.  However, restore from backup is still exposed.

Workaround

In some cases, you can kill the session and try the operation again.