ice the system call. Find out which file numbers are causing the highest average waits and then determine which filesystem contains the file Determine why the filesystems are performing poorly. Some common causes are:
"hot filesystems" - too many active files on the same filesystem exhausting the I/O bandwidth hardware problem In Parallel Execution (PX) is being used, determine if the I/O subsystem is saturated by having too many slaves in use. 参考文档：文档 ID 1477229.1 ——————————————————————————————————————————————————————————————————————————————————————————————————Rhys——————————————
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