GS_FILE_STAT

GS_FILE_STAT records statistics about data file I/O to indicate I/O performance and detect performance problems such as abnormal I/O operations.

Table 1 GS_FILE_STAT 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, in microseconds

writetim

bigint

Total duration of writing, in microseconds

avgiotim

bigint

Average duration of reading and writing, in microseconds

lstiotim

bigint

Duration of the last file reading, in microseconds

miniotim

bigint

Minimum duration of reading and writing, in microseconds

maxiowtm

bigint

Maximum duration of reading and writing, in microseconds

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