了解Maclean Liu|向Maclean Liu提问 Oracle ALLSTARS 全明星(群内有多位Oracle高级售后support，N位OCM和ACE) QQ群 # QQ群号:23549328 # 已经升级到 2000人群，空位多多。欢迎有一定基础的Oracle骨友加入，现在入群需要经过Maclean的技术面试，欢迎面试，请加QQ号:47079569 为好友参加面试 2群基础群 适合刚入门的同学，会共享最佳入门实践和资料 QQ群 # QQ群号:171092051 # 已经升级到 500人的超级群，空位多多，无需面试

PX qref latch等待事件

Contention caused by communication between parallel query processes.      

Solutions

Decrease the degree of parallelism for the queries Tune the parallel_execution_message_size parameter (may require larger amounts of memory) Disable parallel query if these waits taken longer than a serial run (parallel_max_servers=0)

posted on 2013-03-19 00:47  Oracle和MySQL  阅读(255)  评论(0)    收藏  举报

导航