pg_controldata ( some values missing)

Hi,
I wondering about some data missing after the execution of
pg_controldata (pg_control last modified and Time of latest
checkpoint), is it normal ?


pg_control version number:            72
Catalog version number:               200211021
Database cluster state:               in production
pg_control last modified:
Current log file ID:                  17
Next log file segment:                184
Latest checkpoint location:           11/B6F1C554
Prior checkpoint location:            11/B617B6F4
Latest checkpoint's REDO location:    11/B6BAF378
Latest checkpoint's UNDO location:    0/0
Latest checkpoint's StartUpID:        17
Latest checkpoint's NextXID:          56642758
Latest checkpoint's NextOID:          1648295
Time of latest checkpoint:
Database block size:                  8192
Blocks per segment of large relation: 131072
Maximum length of identifiers:        64
Maximum number of function arguments: 32
Date/time type storage:               Floating point
Maximum length of locale name:        128
LC_COLLATE:                           en_US
LC_CTYPE:                             en_US



#select version();
                           version
-------------------------------------------------------------
 PostgreSQL 7.3.2 on i686-pc-linux-gnu, compiled by GCC 2.96




Ciao
Gaetano