jit_optimize_above_cost
Sets the query cost above which JIT compilation applies expensive optimizations. Such optimization adds planning time, but can improve execution speed. It is not meaningful to set this to less than jit_above_cost, and it is unlikely to be beneficial to set it to more than jit_inline_above_cost. Setting this to -1 disables expensive optimizations. The default is 500000.
英文手册覆盖始于 PostgreSQL 7.4. 来源历史与运行验证各自保留独立版本边界。
当前阅读 PG 18·选择有来源记录的版本
此版本暂无所选语言的定义，以下显示原始英文内容。
- boot val
- 500000
- category
- Query Tuning / Planner Cost Constants
- context
- user
- documented
- true
- enumvals
- 未知
- extra desc
- -1 disables optimization.
- lang
- en
- max val
- 1.79769e+308
- metadata version
- 18
- min val
- -1
- name
- jit_optimize_above_cost
- short desc
- Optimize JIT-compiled functions if query is more expensive.
- source
- pg-settings-source-snapshot
- unit
- 未知
- vartype
- real
版本定义 PG 18
Sets the query cost above which JIT compilation applies expensive optimizations. Such optimization adds planning time, but can improve execution speed. It is not meaningful to set this to less than jit_above_cost, and it is unlikely to be beneficial to set it to more than jit_inline_above_cost. Setting this to -1 disables expensive optimizations. The default is 500000.
比较版本
来源引用
定义来源
center · PostgreSQL 18 · english-manuals:f8ebb4ef7a9ef7db43a37fe172cc5bac958af7e66f02ab949a4fef5eb88ee424
正文语言: en · english-manuals:f8ebb4ef7a9ef7db43a37fe172cc5bac958af7e66f02ab949a4fef5eb88ee424