term聚合查询很慢，涉及到50+个term，有建议吗？

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如上面的查询，确实很慢，后台五台物理机（15个节点）完全hold不住1000+QPS的该类查询，响应尤其的慢，系统负载飙升到150，请问这种垃圾查询有啥建议优化吗？一直靠扩容不行吧，分片30个，总数据量大小500G左右。