Dear All Experts,
I am using in PostgreSQL 8.3.5 database on windows 64 bit OS.
However, I have a batch program written in Java which processes the data
and populates them into tables in Postgres database.
I have 622,000 number of records but it is taking almost 4 and half
hours to load these data into the tables.
I have a simple function in db which is being called from Java batch
program to populate the records into tables from flat files.
I have the below system configuration for my database server.
Database Server
PostgreSQL v8.3.5
Operating System
Windows 2003 Server 64 bit, Service Pack 2
CPU
2 * Quad Core AMD Opteron Processor 2376 @ 2.29 GHz
Memory
16 GB RAM
Disk Space
total 2.5 TB [C drive - 454 GB & D drive 1.99 TB]
and I have set my postgresql.conf parameters as below.
======================================================================
#-----------------------------------------------------------------------
-------
# RESOURCE USAGE (except WAL)
#-----------------------------------------------------------------------
-------
# - Memory -
shared_buffers = 1GB
temp_buffers = 256MB
max_prepared_transactions = 100
work_mem = 512MB
maintenance_work_mem = 512MB
# - Free Space Map -
max_fsm_pages = 1600000
max_fsm_relations = 10000
'
#-----------------------------------------------------------------------
-------
# WRITE AHEAD LOG
#-----------------------------------------------------------------------
-------
wal_buffers = 5MB # min 32kB
checkpoint_segments = 32
checkpoint_completion_target = 0.9
#-----------------------------------------------------------------------
-------
# QUERY TUNING
#-----------------------------------------------------------------------
-------
# - Planner Method Configuration -
enable_hashagg = on
enable_hashjoin = on
enable_indexscan = on
enable_mergejoin = on
enable_nestloop = on
enable_seqscan = on
enable_sort = on
effective_cache_size = 8GB
========================================================================
Please advise me the best or optimum way setting these parameters to
achieve better performance.
Also note that, when I am setting my shared_buffer = 2GB or high ,
Postgres is throwing an error "shared_buffer size cannot be more than
size_t"
It would be very grateful, if anyone can help me on this.
Many thanks
