Often a write to disk. Solutions Consistent Slow Performance Improve I/O Investigate if the application can be changed to perform fewer writes. Abnormal Variations in Performance Investigate potential problems with the operating systems or I/O sub-system. Investigate contention at the disk/controller level.
本文转自maclean_007 51CTO博客，原文链接:http://blog.51cto.com/maclean/1277931
