Do hash expansion in it's own thread

Previously we tried to migrate one bucket over to the new hash table before
we started a new command for a client, and we tried to lock the cache in order
to determine if we should move an item or not. This resulted in extra contention
on an already hot mutex...

1 files changed, 3 insertions, 0 deletions

diff --git a/assoc.h b/assoc.h
index 3b32162..b8ae9c3 100644
--- a/assoc.h
+++ b/assoc.h
@@ -5,3 +5,6 @@ int assoc_insert(item *item);
 void assoc_delete(const char *key, const size_t nkey);
 void do_assoc_move_next_bucket(void);
 uint32_t hash( const void *key, size_t length, const uint32_t initval);
+int start_assoc_maintenance_thread(void);
+void stop_assoc_maintenance_thread(void);
+