FILE_IOSTAT
FILE_IOSTAT records statistics about data file I/Os to indicate I/O performance and detect performance problems such as abnormal I/O operations.
Table 1 FILE_IOSTAT columns
Name | Type | Description |
|---|
filenum | oid | File identifier |
dbid | oid | Database ID |
spcid | oid | Tablespace ID |
phyrds | bigint | Number of times of reading physical files |
phywrts | bigint | Number of times of writing into physical files |
phyblkrd | bigint | Number of times of reading physical file blocks |
phyblkwrt | bigint | Number of times of writing into physical file blocks |
readtim | bigint | Total duration of reading (unit: μs) |
writetim | bigint | 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) |
openGauss 2025-10-31 07:42:18