一. 问题描述 在AIX 6.1+ORACLE 10.2.0.5 的多个数据库的udump,bdump 目录产生了多个trace文件,不断报警告:WARNING:Could not lower the asynch I/O limit to 6144 for SQL direct I/O. It is set to -1二. 问题分析 在metalink上搜索'WARNING:Could not lower the asynch I/O limit to',找到了一篇文章"WARNING:Could not lower the asynch I/O limit to 224 for SQL direct I/O. It is set to -1" After Upgrading To 10.2.0.5 [ID 1155445.1]",其内容如下: This document is being delivered to you via Oracle Support's Rapid Visibi...

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