Bits in the delete byte

This topic contains Diagnosis, Modification, and Tuning information.

The meaning of each bit in the delete byte, when turned on, is as follows:

Bit

Meaning When Delete Byte is Turned On

0

Segment has been marked for deletion. This bit is used for segments in a HISAM or secondary index database or segments in primary index.

1

Database record has been marked for deletion. This bit is used for segments in a HISAM or secondary index database or segments in a primary index.

2

Segment has been processed by the delete routine.

3

This bit is reserved.

4

Prefix and data portion of the segment are separated in storage. (The delete byte preceding the separated data portion of the segment has all bits turned on.)

5

Segment has been marked for deletion from a physical path. This bit is called the PD (physical delete) bit.

6

Segment has been marked for deletion from a logical path. This bit is called the LD (logical delete) bit.

7

Segment has been marked for removal from its logical twin chain. This bit should only be set on if bits 5 and 6 are also on).