-- Create a new table before replacing in order to avoid a long-held lock on
-- the table being replaced. The site should remain responsive while these
-- queries are run.
BEGIN;
CREATE TABLE man_index_new AS SELECT DISTINCT name, section FROM man;
CREATE INDEX ON man_index_new USING btree(lower(name) text_pattern_ops);
DROP TABLE man_index;
ALTER TABLE man_index_new RENAME TO man_index;
COMMIT;

BEGIN;
CREATE TABLE stats_cache_new AS SELECT count(distinct hash) AS hashes, count(distinct name) AS mans, count(*) AS files, count(distinct package) AS packages FROM man;
DROP TABLE stats_cache;
ALTER TABLE stats_cache_new RENAME TO stats_cache;
COMMIT;