說(shuō)明

• query.max-memory: The maximum amount of distributed memory that a query may use.
• query.max-memory-per-node: The maximum amount of user memory that a query may use on any one machine.
• query.max-total-memory-per-node: The maximum amount of user and system memory that a query may use on any one machine, where system memory is the memory used during execution by readers, writers, and network buffers, etc.

注意：

• query.max-memory:表示單個(gè)查詢?cè)诜植荚谒邢嚓P(guān)節(jié)點(diǎn)上能用的內(nèi)存之和的最大值。
• query.max-memory-per-node：?jiǎn)蝹€(gè)查詢?cè)趩蝹€(gè)節(jié)點(diǎn)上用戶內(nèi)存能用的最大值，從定義上就能看出：query.max-memory-per-node 必須小于query.max-total-memory-per-node
• 同樣： query.max-memory 也必須小于query.max-total-memory
• 另外：query.max-total-memory-per-node 與memory.heap-headroom-per-node 之和必須小于 jvm max memory .也就是jvm.config 中配置的-Xmx

總結(jié)

image.png