We have 64GB of Memory on RHEL 6.4
shared_buffers = 8GB
work_mem = 64MB
maintenance_work_mem = 1GB
effective_cache_size = 48GB
I found this list of recommended parameters for memory management in PostgreSQL.
About shared_buffers:
- Below 2GB, set to 20% of total system memory.
- Below 32GB, set to 25% of total system memory.
- Above 32GB, set to 8GB
About work_mem, this parameter can cause a huge speed-up if set properly, however it can use that amount of memory per planning node.
Here are some recommendations to set it up.
- Start low: 32-64MB
- Look for ‘temporary file’ lines in logs
- Set to 2-3x the largest temp file
About maintenance_work_mem, some recommendations were:
- 10% of system memory, up to1GB
- Maybe even higher if you are having VACUUM problems
About effective_cache_size, guidelines suggested.
- Set to the amount of file system cache available
- If you don’t know, set it to 50% of total system memory
We have real time 24/7 data ingest processes running on our 9.3.2 database 7TB in size
Do these settings look correct for 9.3.2?
thanks