文章浏览阅读259次。解决办法故障总结系统中的global read lock被其它线程获取了(被加上了S锁),因此DML在grl上面加IX锁时会出现Waiting for global read lock,而set read_only在grl上加的是S锁,因此此时是可以grant的,而此时系统中存在大......
文章浏览阅读7.4k次。Spark从外部读取数据之textFile textFile函数/** * Read a text file from HDFS, a local file system (available on all nodes), or any * Hadoop-s..._spark read one file...
文章浏览阅读518次。Flush tables:Closes all open tables, forces all tables in use to be closed, and flushes the query cache. FLUSH TABLES also removes all query results from the query cache, like the RESET QUERY CACHE st......