Performance issues

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Hi,

I am running Postgresql 8.4.7 with Postgis 2.0 (for raster support).
Server is mainly 1 user for spatial data processing. This involves queries that can take hours.

This is running on a ubuntu 10.10 Server with Core2Duo 6600 @ 2.4 GHZ, 6 GB RAM.

My postgresql.conf:
# - Memory -
shared_buffers = 1024MB                 # min 128kB
                                        # (change requires restart)
temp_buffers = 256MB                    # min 800kB
#max_prepared_transactions = 0          # zero disables the feature
                                        # (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).
# It is not advisable to set max_prepared_transactions nonzero unless you
# actively intend to use prepared transactions.
work_mem = 1024MB                               # min 64kB
maintenance_work_mem = 256MB            # min 1MB
max_stack_depth = 7MB                   # min 100kB
wal_buffers = 8MB 
effective_cache_size = 3072MB

Everything else is default.

My Pgbench results:
/usr/lib/postgresql/8.4/bin/pgbench -T 60 test1
starting vacuum...end.
transaction type: TPC-B (sort of)
scaling factor: 1
query mode: simple
number of clients: 1
duration: 60 s
number of transactions actually processed: 7004
tps = 116.728199 (including connections establishing)
tps = 116.733012 (excluding connections establishing)


My question is if these are acceptable results, or if someone can recommend settings which will improve my servers performance.

Andreas

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