32.3. Configuration

|   32.3. Configuration   |              |                                          |                  |                               |
|:-----------------------:|--------------|------------------------------------------|------------------|-------------------------------|
|[Prev](jit-decision.html)|[Up](jit.html)|Chapter 32. Just-in-Time Compilation (JIT)|[Home](index.html)| [Next](jit-extensibility.html)|

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## 32.3. Configuration

 The configuration variable [jit](runtime-config-query.html#GUC-JIT) determines whether JIT compilation is enabled or disabled. If it is enabled, the configuration variables [jit\_above\_cost](runtime-config-query.html#GUC-JIT-ABOVE-COST), [jit\_inline\_above\_cost](runtime-config-query.html#GUC-JIT-INLINE-ABOVE-COST), and [jit\_optimize\_above\_cost](runtime-config-query.html#GUC-JIT-OPTIMIZE-ABOVE-COST) determine whether JIT compilation is performed for a query, and how much effort is spent doing so.

[jit\_provider](runtime-config-client.html#GUC-JIT-PROVIDER) determines which JIT implementation is used. It is rarely required to be changed. See [Section 32.4.2](jit-extensibility.html#JIT-PLUGGABLE).

 For development and debugging purposes a few additional configuration parameters exist, as described in [Section 20.17](runtime-config-developer.html).

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|[Prev](jit-decision.html)|  [Up](jit.html)  | [Next](jit-extensibility.html)|
|:------------------------|:----------------:|------------------------------:|
|   32.2. When to JIT?    |[Home](index.html)|      32.4. Extensibility      |

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