EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Hacker News·Sep 4·5 min read
Some more thoughts on random_page_cost
TL;DR
Discussions on random_page_cost highlight its significance in optimizing database performance for both random and sequential access patterns. Insights from previous talks and a chart illustrate its impact on storage efficiency.
✦ Why It Matters
Evaluate and adjust random_page_cost settings in your database to enhance query performance today.
Key Takeaways
- Monitor query performance using pg_stat_statements.
- Consider lowering random_page_cost for queries accessing localized data.
- Adjust random_page_cost based on specific storage performance metrics.
- Understand the impact of memory usage on query execution plans.
How It Works
The random_page_cost parameter serves as a proxy for estimating the cost of random I/O operations in query planning. By lowering this value, the planner may favor query plans that access a smaller, more localized active set of data, which can improve performance by reducing memory eviction and cache misses.