I cannot vacuum

Hi,

I have a problem today when I vacuum one table which is vacuumed every
today, I tried re_create index also, didn't work.

urldb=# VACUUM VERBOSE ANALYZE id;
NOTICE: Vacuum: table not found
VACUUM
urldb=# VACUUM VERBOSE ANALYZE ip;
NOTICE: --Relation ip--
NOTICE: Pages 4373: Changed 0, reaped 151, Empty 0, New 0; Tup 662929:
Vac 164, Keep/VTL 0/0, Crash 0, UnUsed 23401, MinLen 48, MaxLen 48;
Re-using: Free/Avail. Space 1137624/0; EndEmpty/Avail. Pages 150/0. CPU
0.33s/2.28u sec.
NOTICE: Index ip_ip: Pages 2093; Tuples 662929: Deleted 0. CPU
0.15s/0.73u sec.
NOTICE: Index ip_id: Pages 1311; Tuples 662929: Deleted 0. CPU
0.11s/0.70u sec.
NOTICE: Rel ip: Pages: 4373 --> 4223.
NOTICE: FlushRelationBuffers(ip, 4223): block 4365 is referenced (private
0, global 8)
FATAL 1: VACUUM (vc_vacheap): FlushRelationBuffers returned -2
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Succeeded.

any suggestion??

Jie LIANG

St. Bernard Software

10350 Science Center Drive
Suite 100, San Diego, CA 92121
Office:(858)320-4873

jliang(at)ipinc(dot)com
www.stbernard.com
www.ipinc.com