caches: log properly how we cleanup cache keys

rhodecode/lib/rc_cache/cache_key_meta.py

@@ -34,14 +34,15 b' def free_cache_keys(*args):'
         return
 
     from rhodecode.model.db import Session, CacheKey
-    log.info('Clearing %s cache keys', len(cache_keys_by_pid))
 
     if cache_keys_by_pid:
         try:
             for cache_proc in set(cache_keys_by_pid):
                 like_expression = '{}%'.format(cache_proc)
-                CacheKey.query().filter(
-                    CacheKey.cache_key.like(like_expression)).delete(synchronize_session='fetch')
+                qry = CacheKey.query().filter(CacheKey.cache_key.like(like_expression))
+                count = qry.count()
+                log.info('Clearing %s: %s cache keys, total: %s', cache_proc, len(cache_keys_by_pid), count)
+                qry.delete(synchronize_session='fetch')
                 cache_keys_by_pid.remove(cache_proc)
             Session().commit()
         except Exception: