My Oracle Support Banner

SMON is Generating a Trace File With UNDO SEG (BEFORE RECOVERY) Information (Doc ID 754743.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Server - Enterprise Edition - Version: 9.2.0.1 to 10.2.0.4 - Release: 9.2 to 10.2
Information in this document applies to any platform.

Goal

A SMON trace is showing the following message:

$ more ORCL_smon_3735640.trc

UNDO SEG (BEFORE RECOVERY): usn = 0 Extent Control Header
-----------------------------------------------------------------
Extent Header:: spare1: 0 spare2: 0 #extents: 6 #blocks: 95
last map 0x00000000 #maps: 0 offset: 2080
Highwater:: 0x0040032a ext#: 4 blk#: 9 ext size: 16
#blocks in seg. hdr's freelists: 0
#blocks below: 0
mapblk 0x00000000 offset: 4
Unlocked
Map Header:: next 0x00000000 #extents: 6 obj#: 0 flag: 0x40000000
Extent Map
-----------------------------------------------------------------

Is this an actual error or simply an informational message? If informational, how can this be
turned off?

Solution

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!

In this Document
  Goal
  Solution
  References

My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.