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在oracle数据库中,db file sequential read等待P2参数的含义是?()
A.访问的文件名
B.访问的文件号
C.文件拥有者
D.访问的数据块号
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A.错误B.正确
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Oracle数据中,下列哪些等待事件将产生大量的IO?()A、log file parallel writeB、latch:cache buffers chainsC、db file sequential readD、db file scattered read
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判断题数据块是Oracle数据库读/写数据的最小存储单元,它的大小由初始化参数db_block_size决定,在Oracle数据库创建时就决定了db_block_size的值。A
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单选题oracle数据库中下列哪个等待事件显示行级锁竞争?()A
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多选题You notice a high number of waits for the db file scattered read and db file sequential read events in the recent Automatic Database Diagnostic Monitor (ADDM) report. After further investigation, you find that queries are performing too many full table scans and indexes are not being used even though the filter columns are indexed. Identify three possible reasons for this.()AMissing or stale histogram statisticsBUndersized shared poolCHigh clustering factor for the indexesDHigh value for the DB_FILE_MULTIBLOCK_READ_COUNT parameterEOversized buffer cache
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多选题Oracle数据中,下列哪些等待事件将产生大量的IO?()Alog file parallel writeBlatch:cache buffers chainsCdb file sequential readDdb file scattered read
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单选题在oracle数据库中,db file sequential read等待P2参数的含义是?()A
访问的文件名B
访问的文件号C
文件拥有者D
访问的数据块号
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