X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Fpostgresql_default.conf;fp=src%2Fpostgresql_default.conf;h=83a32c77b3fd7b1883c82de65cb1b60e1acbdc45;hp=d289ded5d8fe21bd02a735a28946f075c8b48509;hb=6d86a97190a193863aadc252f20f6b9dba61c263;hpb=49cf50f058fc3a7322899b4eca4223dd71bc605a

diff --git a/src/postgresql_default.conf b/src/postgresql_default.conf
index d289ded5..83a32c77 100644
--- a/src/postgresql_default.conf
+++ b/src/postgresql_default.conf
@@ -141,14 +141,14 @@
 </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>