The following table gives examples of the buffer size calculation for various types of publisher nodes.

Default buffer size taken for calculation is 50 MB for Unified CM publisher node and 20 MB for Instant Messaging & Presence (IM&P) publisher nodes.

For all the subscriber nodes, default buffer size is 20 MB.

Enterprise Node

Disk Size (GB)

Memory (GB)

CPU Count

Buffer Size (MB)

Unified CM publisher

70

6

2

30

80

6

1

30

110

8

2

90

110

8

4

100

IM&P publisher

80

2

1

20

80

4

1

20

80

4

2

20

80

8

4

20

80

16

6

20