[patch pushed] debuginfod: Tweak groom cycle for memory freeing

[Frank Ch. Eigler]

Hi -

After an irresistible sales job on irc, pushed to master:

diff --git a/debuginfod/ChangeLog b/debuginfod/ChangeLog
index a1d17b5f9a23..f37c85302886 100644
--- a/debuginfod/ChangeLog
+++ b/debuginfod/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-25  Frank Ch. Eigler  <fche@redhat.com>
+
+       * debuginfod.cxx (groom): Add a sqlite3_db_release_memory()
+       at the end of periodic grooming to try to shrink the process.
+
 2019-11-24  Mark Wielaard  <mark@klomp.org>
 
        * debuginfod.cxx (test_webapi_sleep): Removed.
diff --git a/debuginfod/debuginfod.cxx b/debuginfod/debuginfod.cxx
index cb0e1f3bf0a4..aa7ffcf662aa 100644
--- a/debuginfod/debuginfod.cxx
+++ b/debuginfod/debuginfod.cxx
@@ -2357,6 +2357,8 @@ void groom()
 
   database_stats_report();
 
+  sqlite3_db_release_memory(db); // shrink the process if possible
+
   gettimeofday (&tv_end, NULL);
   double deltas = (tv_end.tv_sec - tv_start.tv_sec) + (tv_end.tv_usec - tv_start.tv_usec)*0.000001;