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Hey
all. When
running pgstatindex(some_index) I'm getting the usual result: Version,
tree_level, index_size, root_block_no, internal_pages, leaf_pages, empty_pages,
deleted_pages, avg_leaf_density, leaf_fragmentation with
a bunch of numbers. Now,
my question are What
each one represent (aside from the label), what exactly is "average leaf density"
or "leaf fragmentation" or any other label? And
even more importantly, how can I make sense out of this number regarding my
index? I've
been told that if "Leaf Frag" is above magic number, then reindex. But
I'm looking for a more empirical approach. Intuitively,
I assume that an index state depends on many params that are somehow reflected
by those number, and if I'll understand those, I could understand my indexes
state better. Thanks. Shlomi. |
