+ pg_db_size => ['DEF:pg_db_size_avg={file}:value:AVERAGE',
+ 'DEF:pg_db_size_min={file}:value:MIN',
+ 'DEF:pg_db_size_max={file}:value:MAX',
+ "AREA:pg_db_size_max#$HalfBlue",
+ "AREA:pg_db_size_min#$Canvas",
+ "LINE1:pg_db_size_avg#$FullBlue:Bytes",
+ 'GPRINT:pg_db_size_min:MIN:%4.1lf%s Min,',
+ 'GPRINT:pg_db_size_avg:AVERAGE:%4.1lf%s Avg,',
+ 'GPRINT:pg_db_size_max:MAX:%4.1lf%s Max,',
+ 'GPRINT:pg_db_size_avg:LAST:%4.1lf%s Last'],