GS_REL_IOSTAT displays disk I/O statistics on the current node. In the current version, only one page is read or written in each read or write operation. Therefore, the number of read/write times is the same as the number of pages.

**Table 1** GS_REL_IOSTAT columns
Column	Type	Description
phyrds	Bigint	Number of disk reads
phywrts	Bigint	Number of disk writes
phyblkrd	Bigint	Number of read pages
phyblkwrt	Bigint	Number of written pages