2012年8月21日
Oracle -----认识数据库碎片，认识RowChainRowMigrate
摘要： Row MigrationWe will migrate a row when an update to that row would cause it to not fit on the block anymore (with all of the other data that exists there currently). A migration means that the entire row will move and we just leave behind the «forwarding address». So, the original block j 阅读全文
posted @ 2012-08-21 17:47 jerry_xing8 阅读(1411) 评论(0) 推荐(0)