SUMMARY_FILE_IOSTAT
Records statistics about data file I/Os in the cluster to reflect performance issues such as exceptions in I/O operations.
Name | Type | Description |
|---|---|---|
filenum | oid | File ID. |
dbid | oid | Database ID. |
spcid | oid | Tablespace ID. |
phyrds | numeric | Number of times of reading physical files. |
phywrts | numeric | Number of times of writing into physical files. |
phyblkrd | numeric | Number of times of reading physical file blocks. |
phyblkwrt | numeric | Number of times of writing into physical file blocks. |
readtim | numeric | Total duration of reading (unit: μs). |
writetim | numeric | Total duration of writing (unit: μs). |
avgiotim | bigint | Average duration of reading and writing (unit: μs). |
lstiotim | bigint | Duration of the last file reading (unit: μs). |
miniotim | bigint | Minimum duration of reading and writing (unit: μs). |
maxiowtm | bigint | Maximum duration of reading and writing (unit: μs). |
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