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perf: increase default memory pool to 150MB with 40MB sort spill reservation #7675

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Merged
westonpace merged 4 commits into from
Jul 8, 2026
+14 −4
Merged

perf: increase default memory pool to 150MB with 40MB sort spill reservation #7675

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2230777
perf: increase default memory pool to 150MB with 50MB sort spill rese…
westonpace Jul 7, 2026
2dfac13
perf: derive sort spill reservation as 1/3 of pool size
westonpace Jul 7, 2026
b52bd96
cargo fmt
westonpace Jul 7, 2026
cdaea7f
Further tweaks
westonpace Jul 8, 2026
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6 changes: 4 additions & 2 deletions rust/lance-datafusion/src/exec.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -310,7 +310,7 @@ impl std::fmt::Debug for LanceExecutionOptions {
}
}

const DEFAULT_LANCE_MEM_POOL_SIZE_PER_PARTITION: u64 = 100 * 1024 * 1024;
const DEFAULT_LANCE_MEM_POOL_SIZE_PER_PARTITION: u64 = 150 * 1024 * 1024;
const DEFAULT_LANCE_MAX_TEMP_DIRECTORY_SIZE: u64 = 100 * 1024 * 1024 * 1024; // 100GB

impl LanceExecutionOptions {
Expand Down Expand Up @@ -360,7 +360,9 @@ impl LanceExecutionOptions {
}

pub fn new_session_context(options: &LanceExecutionOptions) -> SessionContext {
let mut session_config = SessionConfig::new();
let sort_spill_reservation_bytes = (options.mem_pool_size() / 3) as usize;
let mut session_config =
SessionConfig::new().with_sort_spill_reservation_bytes(sort_spill_reservation_bytes);
let mut runtime_env_builder = RuntimeEnvBuilder::new();
if let Some(target_partition) = options.target_partition {
session_config = session_config.with_target_partitions(target_partition);
Expand Down
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