On a regular basis now I am getting duplicate keys in unique index pg_statistic_relid_att_index. Could this be cause by in insert into a table that is being "vacuum analyse" 'd ?
I have tried reindexing the database, but it always fails because there are duplicate rows in pg_statisitic. This leads to even more problems because the object for the index in data/base disappears.
I have checked all my application code. But inserting while vacuuming is somthing I am not sure about.
The inserts are comming from a client using pg_connect. A vacuum analyse on certain tables while inserts are being executed is very possible.
I am going to change the code to "vacuum full analyse" in our test regions. But this is not ideal in our production regions.