PGXC_GET_TABLE_SKEWNESS

PGXC_GET_TABLE_SKEWNESS displays the data skew on tables in the current database. Only the system administrator or the preset role gs_role_read_all_stats can access this view.

**Table 1** PGXC_GET_TABLE_SKEWNESS columns
Column	Type	Description
schemaname	Name	Schema name of a table
tablename	Name	Name of a table
totalsize	Numeric	Total size of a table, in bytes
avgsize	numeric(1000,0)	Average table size (total table size divided by the number of DNs), which is the ideal size of tables distributed on each DN
maxratio	numeric(10,3)	Ratio of the maximum table size on a single DN to the value of avgsize.
minratio	numeric(10,3)	Ratio of the minimum table size on a single DN to avgsize
skewsize	Bigint	Table skew rate (the maximum table size on a single DN minus the minimum table size on a single DN)
skewratio	numeric(10,3)	Table skew rate (skewsize/avgsize)
skewstddev	numeric(1000,0)	Standard deviation of table distribution (For two tables of the same size, a larger deviation indicates a more severe skew.)