From: Howard Chu <hyc@openldap.org>
Date: Thu, 20 Mar 2003 12:40:11 +0000 (+0000)
Subject: ITS#2389 - stop reading requests on a conn if it has more than
X-Git-Tag: NO_SLAP_OP_BLOCKS~78
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=a63b8908cd7f16110496a8fb2859572f86cbf71f;p=openldap

ITS#2389 - stop reading requests on a conn if it has more than
connection_pool_max/2 operations already executing. May want to tune
this to a higher value, e.g. connection_pool_max - XX, etc. Fix in
result.c throttles the connection too late, all threads are already
consumed by the time the send buffer blocks.
---

diff --git a/servers/slapd/connection.c b/servers/slapd/connection.c
index 005496fdd9..3dcadbc58b 100644
--- a/servers/slapd/connection.c
+++ b/servers/slapd/connection.c
@@ -1493,6 +1493,15 @@ connection_input(
 
 	} else {
 		conn->c_n_ops_executing++;
+		/* Don't allow any single conn to soak up all of the
+		 * available threads
+		 */
+		if (conn->c_n_ops_executing > connection_pool_max/2) {
+			ber_socket_t	sd;
+
+			ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
+			slapd_clr_read( sd, 0 );
+		}
 		connection_op_activate( conn, op );
 	}