不过，由于程序库和内核版本的重要变化，对尝试优化自己应用程序性能的开发人员来说，重新编译源代码可能是最好的选择。
However, with the major changes in libraries and kernel versions, a recompile from source is probably the best option for a developer trying to get optimal performance out of their application.
如果是这样的话，尝试优化相应的索引以提高性能。
If so, try to tune the corresponding index to improve the performance.
这意味着优化器将始终尝试为每个查询制定减少总体成本的存取路径。
This means the optimizer will always attempt to formulate an access path for each query that reduces overall cost.
应用推荐