Re: index question

The index that I've created and is working is:

Index without typecasting:

> CREATE INDEX CONCURRENTLY ix_clientids2 ON gorfs.inode_segments USING
> btree (full_path);

Thanks for the help, guys!

Melvin, that Query you sent is very interesting..

SELECT n.nspname as schema,
> i.relname as table,
> i.indexrelname as index,
> i.idx_scan,
> i.idx_tup_read,
> i.idx_tup_fetch,
> CASE WHEN idx.indisprimary
> THEN 'pkey'
> WHEN idx.indisunique
> THEN 'uidx'
> ELSE 'idx'
> END AS type,
> pg_get_indexdef(idx.indexrelid),
> CASE WHEN idx.indisvalid
> THEN 'valid'
> ELSE 'INVALID'
> END as statusi,
> pg_relation_size(quote_ident(n.nspname)|| '.' ||
> quote_ident(i.relname)) as size_in_bytes,
> pg_size_pretty(pg_relation_size(quote_ident(n.nspname)|| '.' ||
> quote_ident(i.relname))) as size
> FROM pg_stat_all_indexes i
> JOIN pg_class c ON (c.oid = i.relid)
> JOIN pg_namespace n ON (n.oid = c.relnamespace)
> JOIN pg_index idx ON (idx.indexrelid = i.indexrelid )
> WHERE n.nspname NOT LIKE 'pg_%'
> ORDER BY 1, 2, 3;

I've found more then 100 indexes that the columns:

"idx_scan", "idx_tup_read" and "idx_tup_fetch" are 0.
So, it's safe to say that they are not being used, is that right?

But some indexes have almost 100GB on the size column. This means they are
not being used now, but they could be used in the past?

- Is it safe to remove them?

Cheers
Lucas