Database activity monitoring

The following is an extract of the output from the DB monitoring tool
that was delivered with the Progress DB. Sorry for the formatting but
I am hopeful you get an idea of what I am talking about. Counters
would be updated every x seconds. Is there something - commercial, non-
commercial, does not matter - available for Postgres.

This was an invaluable tool for monitoring the system both during
development and production support. Naturally the counters would
differ from that of the Progress DB.

Activity  - Sampled at 05/30/107 16:21 for 2739:52:42.

Event                Total  Per Sec    Event                Total  Per
Sec
         Commits         3      0.0               Undos         0
0.0
  Record Updates         2      0.0        Record Reads      5281
0.0
  Record Creates         1      0.0      Record Deletes         0
0.0
       DB Writes         8      0.0            DB Reads       160
0.0
       BI Writes         4      0.0            BI Reads        70
0.0
       AI Writes         0      0.0
    Record Locks        27      0.0        Record Waits         0
0.0
     Checkpoints         0      0.0     Buffers Flushed         0
0.0

Rec Lock Waits    0 %    BI Buf Waits      0 %    AI Buf Waits      0
%
Writes by APW    50 %    Writes by BIW     0 %    Writes by AIW     0
%
Buffer Hits      98 %
DB Size         448 K        BI Size    2048 K        AI Size       0
K
FR chain         83 blocks   RM chain    141 blocks
Shared Memory 14176 K        Segments      1

2 Servers, 0 Users (0 Local, 0 Remote, 0 Batch),2 Apws

RETURN - repeat, U - continue uninterrupted, Q - quit: