| 类型: | real |
| 默认: | 500000 |
| 最低限度: | -1 |
| 最大: | 1.79769e+308 |
| 上下文: | user |
| 重新开始: | false |
| 以来: | 11 |
设置JIT编译尝试内联函数和操作符的查询代价阈值，如果查询代价超过这个值，JIT编译就会尝试内联。内联会增加规划时间，但是可以提高执行速度。将这个参数设置成小于jit_above_cost是没有意义的。将这个参数设置为-1会禁用内联。默认值是500000。
在 StackOverflow
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- PostgreSQL 13 sometimes works but sometimes huge execution time
- Postgresql sequential scan slow performance on 500 million rows