Hello,
I'm having serious peformance problems with PostGreSQL and Windows Server 2003
Enterprise Edition. The PostgreSQL Server don't starts if I set the shared
buffers high than
1GB. All my programs can use only 3 GB of RAM and I have 8GB of RAM.
When I try to execute a query in a table about 4 milion registers, my
application crashes with an error memory message.
The configuration:
PostGreSQL 8.2.5
O.S: Windows Server 2003 Enterprise Edition
Service Pack 2
Computer:
dual quad core Intel(R) Xeon(R) CPU E5345 @ 2.33GHz
8GB of RAM
Physical Address Extension
3 HDs in RAID-5
My boot.ini:
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(2)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS="Windows Server 2003, Enterprise"
/fastdetect /PAE /NoExecute=OptOut /3GB
PostGreSQL.conf:
shared_buffers = 1024MB # min 128kB or max_connections*16kB
# (change requires restart)
temp_buffers = 32MB # min 800kB
#max_prepared_transactions = 5 # can be 0 or more
# (change requires restart)
# Note: increasing max_prepared_transactions costs ~600 bytes of shared memory
# per transaction slot, plus lock space (see max_locks_per_transaction).
work_mem =512MB # min 64kB
maintenance_work_mem = 256MB # min 1MB
max_stack_depth = 2MB # min 100kB
# - Free Space Map -
max_fsm_pages = 409600 # min max_fsm_relations*16, 6 bytes each
# (change requires restart)
#max_fsm_relations = 1000 # min 100, ~70 bytes each
# (change requires restart)
#---------------------------------------------------------------------------
# WRITE AHEAD LOG
#---------------------------------------------------------------------------
# - Checkpoints -
checkpoint_segments = 128 # in logfile segments, min 1, 16MB each
checkpoint_timeout = 15min # range 30s-1h
checkpoint_warning = 30s # 0 is off
#---------------------------------------------------------------------------
# QUERY TUNING
#---------------------------------------------------------------------------
effective_cache_size = 5120MB
Thanks, Cláudia.