From 2b29da0c2ea26907c964bef179337a2cc614a22c Mon Sep 17 00:00:00 2001
From: Nikos Mavrogiannopoulos <nmav@gnutls.org>
Date: Sun, 27 Jun 2010 19:12:28 +0000
Subject: Check the cache DB every 15 minutes instead of checking on every write.

---
diff --git a/NEWS b/NEWS
index c0f3a0d..9750e7d 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,8 @@
 - Depend on gnutls 2.10.0 to force support for safe
   renegotiation.
 
+- Optimizations in session caching.
+
 ** Version 0.5.6 (2010-03-24)
 - Corrected issue with firefox and long POST data (by
   handling EINTR and EAGAIN errors in read).
diff --git a/src/gnutls_cache.c b/src/gnutls_cache.c
index 4d4a661..4d0a733 100644
--- a/src/gnutls_cache.c
+++ b/src/gnutls_cache.c
@@ -309,8 +309,14 @@ static int dbm_cache_expire(mgs_handle_t *ctxt)
     int keyidx = 0;
     int should_delete = 0;
 
-    apr_pool_create(&spool, ctxt->c->pool);
     ex = apr_time_now();
+
+    if (ex - ctxt->sc->last_cache_check < 900)
+      return 0;
+
+    ctxt->sc->last_cache_check = ex;
+
+    apr_pool_create(&spool, ctxt->c->pool);
     
     rv = apr_dbm_open(&dbm, ctxt->sc->cache_config, APR_DBM_READONLY,
                       SSL_DBM_FILE_MODE, spool);
--
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