pg_dump out of memory

Hi All,

I moved a physical box to a VM, and set its memory to 1Gig. Everything
runs fine except one backup:

/pub/backup# pg_dump -Fc -U postgres -f wildfire.backup wildfirep

g_dump: Dumping the contents of table "ofrrds" failed: PQgetResult() failed.
pg_dump: Error message from server: ERROR: out of memory
DETAIL: Failed on request of size 1073741823.
pg_dump: The command was: COPY public.ofrrds (id, updateddate, bytes) TO
stdout;

I've been reducing my memory settings:

maintenance_work_mem = 80MB
work_mem = 5MB
shared_buffers = 200MB

But it doesnt seem to make a difference.
The tables looks like:

wildfire=# \dt+ ofrrds
List of relations
Schema | Name | Type | Owner | Size | Description
--------+--------+-------+-------+-------+-------------
public | ofrrds | table | andy | 15 MB |

ildfire=# \d ofrrds
Table "public.ofrrds"
Column | Type | Modifiers
-------------+------------------------+-----------
id | character varying(100) | not null
updateddate | bigint | not null
bytes | bytea |
Indexes:
"ofrrds_pk" PRIMARY KEY, btree (id)

wildfire=# select id, length(bytes) from ofrrds;
id | length
-------------------+-----------
muc_rooms | 152330241
packet_count | 76165121
muc_users | 76165121
sessions | 76165121
muc_occupants | 9520641
muc_traffic |
server_bytes | 301850625
proxyTransferRate | 76165121
server_sessions | 152330241
conversations | 304660481
(10 rows)

I'm not sure how to get this backup to run. Any hints would be appreciated.

-Andy