log more details about fd usage

diff --git a/src/main.c b/src/main.c
index 88e353a158a783d903e730665177a34146431170..ad3d67732468a4e12c7a062daf351cb3dce19473 100644 (file)
--- a/src/main.c
+++ b/src/main.c
@@ -410,12 +410,31 @@ static void write_pidfile(void)
 static void check_limits(void)
 {
        struct rlimit lim;
-       int err = getrlimit(RLIMIT_NOFILE, &lim);
-       if (err < 0)
+       int total_users = statlist_count(&user_list);
+       int fd_count;
+       int err;
+       List *item;
+       PgDatabase *db;
+
+       /* load limits */
+       err = getrlimit(RLIMIT_NOFILE, &lim);
+       if (err < 0) {
                log_error("could not get RLIMIT_NOFILE: %s", strerror(errno));
-       else
-               log_info("File descriptors limits: S:%d H:%d",
-                        (int)lim.rlim_cur, (int)lim.rlim_max);
+               return;
+       }
+
+       /* calculate theoretical max, +10 is just in case */
+       fd_count = cf_max_client_conn + 10;
+       statlist_for_each(item, &database_list) {
+               db = container_of(item, PgDatabase, head);
+               if (db->forced_user)
+                       fd_count += db->pool_size;
+               else
+                       fd_count += db->pool_size * total_users;
+       }
+
+       log_info("File descriptor limit: %d (H:%d), max_client_conn: %d, max fds possible: %d",
+                (int)lim.rlim_cur, (int)lim.rlim_max, cf_max_client_conn, fd_count);
 }
 
 static void daemon_setup(void)