问题标签 [postgresql-parallel-query]
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sql - 优化大表上的 SELECT count(*)
PostgreSQL 14 上具有 64GB 内存和 20 个线程的大型表的基本计数。存储是 NVME 磁盘。
问题:
- 如何改进此选择计数查询的查询?我应该对 Postgres 配置进行哪些优化?
- 工人计划是4,但发射是0,这正常吗?