</Query>
<Query disk_io>
- Statement "SELECT sum(heap_blks_read) AS heap_read, \
- sum(heap_blks_hit) AS heap_hit, \
- sum(idx_blks_read) AS idx_read, \
- sum(idx_blks_hit) AS idx_hit, \
- sum(toast_blks_read) AS toast_read, \
- sum(toast_blks_hit) AS toast_hit, \
- sum(tidx_blks_read) AS tidx_read, \
- sum(tidx_blks_hit) AS tidx_hit \
+ Statement "SELECT coalesce(sum(heap_blks_read), 0) AS heap_read, \
+ coalesce(sum(heap_blks_hit), 0) AS heap_hit, \
+ coalesce(sum(idx_blks_read), 0) AS idx_read, \
+ coalesce(sum(idx_blks_hit), 0) AS idx_hit, \
+ coalesce(sum(toast_blks_read), 0) AS toast_read, \
+ coalesce(sum(toast_blks_hit), 0) AS toast_hit, \
+ coalesce(sum(tidx_blks_read), 0) AS tidx_read, \
+ coalesce(sum(tidx_blks_hit), 0) AS tidx_hit \
FROM pg_statio_user_tables;"
<Result>