Set up docs MCPThese settings are available in system.settings and are autogenerated from source.
webassembly_udf_max_fuel
Experimental featureType
UInt64
Default
100000
Version history
| Version | Default value | Comment |
|---|---|---|
| 26.3 | 100000 | New setting to limit CPU instructions (fuel) per WebAssembly UDF instance execution. |
Fuel limit per WebAssembly UDF instance execution. Each WebAssembly instruction consumes some amount of fuel. The value is scaled by 1024 before being passed to the runtime, so webassembly_udf_max_fuel = 1 corresponds to approximately 1024 fuel units. Set to 0 for no finite limit. Applies only to functions whose per-function setting webassembly_udf_enable_fuel is true, which is the default.
webassembly_udf_max_input_block_size
Experimental featureType
UInt64
Default
0
Version history
| Version | Default value | Comment |
|---|---|---|
| 26.3 | 0 | New setting to limit input block size for WebAssembly UDFs. |
Maximum number of rows passed to a WebAssembly UDF in a single block. Set to 0 to process all rows at once.
webassembly_udf_max_instances
Experimental featureType
UInt64
Default
32
Version history
| Version | Default value | Comment |
|---|---|---|
| 26.3 | 32 | New setting to limit the number of parallel WebAssembly UDF instances per function. |
Maximum number of WebAssembly UDF instances that can run in parallel per function.
webassembly_udf_max_memory
Experimental featureType
UInt64
Default
134217728
Version history
| Version | Default value | Comment |
|---|---|---|
| 26.3 | 134217728 | New setting to limit memory per WebAssembly UDF instance. |
Memory limit in bytes per WebAssembly UDF instance.