From: Artem Boldariev <artem@boldariev.com>
Date: Tue, 25 Feb 2025 17:58:24 +0000 (+0200)
Subject: DoH: Bump the active streams processing limit
X-Git-Tag: v9.18.35~7^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=94bcd8c2539b74e36053fd7fd1c8e6cb469c3930;p=thirdparty%2Fbind9.git

DoH: Bump the active streams processing limit

This commit bumps the total number of active streams (= the opened
streams for which a request is received, but response is not ready) to
60% of the total streams limit.

The previous limit turned out to be too tight as revealed by
longer (≥1h) runs of "stress:long:rpz:doh+udp:linux:*" tests.

(cherry picked from commit eaad0aefe668408d8ae0792796852cc7bccaff0f)
---

diff --git a/lib/isc/netmgr/http.c b/lib/isc/netmgr/http.c
index aac68ba667d..ab3917b2aad 100644
--- a/lib/isc/netmgr/http.c
+++ b/lib/isc/netmgr/http.c
@@ -1562,8 +1562,9 @@ http_too_many_active_streams(isc_nm_http_session_t *session) {
 	 * throttle it as it might be not a friend knocking at the
 	 * door. We already have some job to do for it.
 	 */
-	const uint64_t max_active_streams = ISC_MAX(
-		STREAM_CLIENTS_PER_CONN, session->max_concurrent_streams / 3);
+	const uint64_t max_active_streams =
+		ISC_MAX(STREAM_CLIENTS_PER_CONN,
+			(session->max_concurrent_streams * 6) / 10); /* 60% */
 
 	if (session->client) {
 		return false;