presto config

distributed-joins-enabled

Default value: true

使用分布式join而不是广播式join，可以支持更大的join。
广播式join要求最右侧的表需要能完全放到每个节点的内存中，而分布式join只需要集群的内存中能放进去就行。

redistribute-writes

Default value: true

resources.reserved-system-memory

Default value: JVM max memory * 0.4

-------------进程设置---------------

exchange.client-threads

Default value: 25

exchange.concurrent-request-multiplier

Default value: 3

exchange.max-buffer-size

Default value: 32MB

exchange.max-response-size

Default value: 16MB

sink.max-buffer-size

Default value: 32MB

task.concurrency

Default value: 16

task.http-response-threads

Default value: 100

task.http-timeout-threads

Default value: 3

task.info-update-interval

Default value: 3s

task.max-partial-aggregation-memory

Default value: 16MB

task.max-worker-threads

Default value: Node CPUs * 2

task.min-drivers

Default value: task.max-worker-threads * 2

task.writer-count

Default value: 1

node-scheduler.max-splits-per-node

Default value: 100

node-scheduler.max-pending-splits-per-task

Default value: 10

node-scheduler.min-candidates

Default value: 10

node-scheduler.network-topology

Allowed values: legacy, flat
Default value: legacy

optimizer.dictionary-aggregation

Default value: false

optimizer.optimize-hash-generation

Default value: true

optimizer.optimize-metadata-queries

Default value: false

optimizer.optimize-single-distinct

Default value: true

optimizer.push-aggregation-through-join

Default value: true

optimizer.push-table-write-through-union

Default value: true

regex-library

re2j.dfa-states-limit

re2j.dfa-retries