November 2019
Beginner to intermediate
470 pages
11h 59m
English
Content preview from Mastering PostgreSQL 12 - Third Edition
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Configuring JIT
To use JIT, it has to be added at compile time. The following configure options are available:
--with-llvm build with LLVM based JIT support... LLVM_CONFIG path to llvm-config command
Some Linux distributions ship an extra package containing support for JIT. If you want to make use of JIT, make sure those packages are installed.
Once you have made sure that JIT is available, the following configuration parameters will be available so that you can fine-tune JIT compilation for your queries:
#jit = on # allow JIT compilation#jit_provider = 'llvmjit' # JIT implementation to use#jit_above_cost = 100000 # perform JIT compilation if available # and query more expensive, -1 disables#jit_optimize_above_cost = 500000 # optimize JITed ...
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