Slow catalog query running frequently

In our 5 nodes Vertica cluster, we are seeing following query being executed very frequently (multiple times in a minute) and each run takes more than 10 secs-

select * from (select 'dw_test_1' as catalog_name, schema_name, table_name, table_type, remarks from v_catalog.all_tables order by table_type, catalog_name, schema_name, table_name) as vmd where TABLE_TYPE in ('TABLE') and TABLE_NAME ilike 'PROBABLYNOT' escape E'\\'

We could not trace the source of this query and it seems that this is something Vertica runs itself. 

Is there a way to know what invokes this query and why it runs so frequently and slowly?

Thanks,
Rupendra