Mike,
Dicey question.

IBM provides performance improvements from Major release to Major release,
but direct benchmarks between 6.x and 8.x are not performed.
Additionally IBM altered the workload between testing 6.x and 8.x to
better reflect customer's changing use of Domino.
So direct comparisons can be misleading.
However here are some of the big gains between 6.x and 8.x

ADMINP
Large environments will see a huge reduction in CPU used by ADMINP moving
from ND8 from ND6.
This is due to the redesign of rename/delete in reader/author fields.
Small shops will see little value but our Enterprise customers have
reported net CPU reductions by as much as 25% from this change.

Cluster Replication
Customers using clustering will take advantage of streaming replication in
ND8.
Again returns vary based on the amount of data written to a server but
expect as much as 10% of CPU returned

Database
New ODS, database compression and additional tweaks will reduce both
memory (main storage) and disk io (# of arms) to support the
same workloads in ND8.x compared to ND6.x, Disk Busy rates can be
reduced as much as 15%.

Main Storage
A lot to cover here,
NSF buffer pool has been reworked, Shared memory structures,managing
session memory, The NET is the average customer memory per
user supported has dropped from 2.2 MB to 1.6 MB (your milage may vary).

These are just the big hitters and the impact will vary widely based on
your usage of Domino.


Walter Scanlan
Senior Software Engineer
Office: 507-286-6088
Cell: 507-990-4539

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