8.4 -> 9.1 : ANALYSE VERBOSE; -> out of shared memory

Hi,

we have a problem since we migrate from 8.4 to 9.1

when we play : ANALYSE VERBOSE; ( stat on all databases, with 500 tables
and 1to DATA in all tables)

we now have this message :

org.postgresql.util.PSQLException: ERROR: out of shared memory Indice
: You might need to increase max_locks_per_transaction.

When we was in 8.4, there was no error,

there is our specific postgresql.conf configuration on the server :

default_statistics_target = 200
maintenance_work_mem = 1GB
constraint_exclusion = on
checkpoint_completion_target = 0.9
effective_cache_size = 7GB
work_mem = 48MB
wal_buffers = 32MB
checkpoint_segments = 64
shared_buffers = 2304MB
max_connections = 150
random_page_cost = 2.0
max_locks_per_transaction = 128 # was at default val ( 64?), we already
try to increase it without sucess

Have you any suggestions ?