On Tue, Jun 07, 2005 at 01:36:56PM -0400, Eduardo Bezerra wrote: > hi all, > Someone can help me to find these data about btree index: > * height; > * maximum number of keys per block > * average number of keys per block > * number of leaf blocks > * average number of leaf blocks per total number of keys > * average number of data blocks per total number of keys I guess what I'd do is run pg_filedump in an btree index file to find out. Leaf pages are marked with the BTP_LEAF flag. Regarding the number of keys in a block, it's variable, depends on the size of the keys. You can find out for a particular index using pg_filedump too. -- Alvaro Herrera (<alvherre[a]surnet.cl>) Jude: I wish humans laid eggs Ringlord: Why would you want humans to lay eggs? Jude: So I can eat them