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v3.1

Documentation:v3.1

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SUMMARY_FILE_IOSTAT

SUMMARY_FILE_IOSTAT records statistics about data file I/Os in MogDB to indicate I/O performance and detect performance problems such as abnormal I/O operations.

Table 1 SUMMARY_FILE_IOSTAT columns

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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