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Parallelism
Postgres FM
Considerations for Parallelism and Memory Allocation in Database Workloads
Increasing the default value to 16 for max connections can lead to memory wastage and latency overhead due to temporary files. Parallelism adds complexity to the picture with multiple parallel workers consuming more memory. User-defined functions need to be explicitly marked as parallel safe. There are thresholds for small tables and indexes that can be adjusted based on need.
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