- Changed the defaults for num-queries-per-thread/outgoing-range.

For builtin-select: 512/960, for libevent 1024/4096 and for
         windows 24/48 (because of win api).  This makes the ratio this way
         to improve resilience under heavy load.  For high performance, use
         libevent and possibly higher numbers.


git-svn-id: file:///svn/unbound/trunk@2191 be551aaa-1e26-0410-a405-d3ace91eadb9

doc/Changelog

@@ -1,3 +1,10 @@
+12 July 2010: Wouter
+	- Changed the defaults for num-queries-per-thread/outgoing-range.
+	  For builtin-select: 512/960, for libevent 1024/4096 and for
+	  windows 24/48 (because of win api).  This makes the ratio this way
+	  to improve resilience under heavy load.  For high performance, use
+	  libevent and possibly higher numbers.
+
 10 July 2010: Wouter
 	- GOST enabled if SSL is recent and ldns has GOST enabled too.
 	- ldns tarball updated.

doc/example.conf.in

@@ -54,8 +54,9 @@ server:
 	# outgoing-interface: 2001:DB8::6
 
 	# number of ports to allocate per thread, determines the size of the
-	# port range that can be open simultaneously. 
-	# outgoing-range: 256
+	# port range that can be open simultaneously.  About double the
+	# num-queries-per-thread, or, use as many as the OS will allow you.
+	# outgoing-range: 4096
 
 	# permit unbound to use this port number or port range for
 	# making outgoing queries, using an outgoing interface.

doc/unbound.conf.5.in

@@ -141,8 +141,9 @@ sent via a random outgoing interface to counter spoofing.
 .TP
 .B outgoing\-range: \fI<number>
 Number of ports to open. This number of file descriptors can be opened per 
-thread. Must be at least 1. Default is 256. Larger numbers need extra 
-resources from the operating system.
+thread. Must be at least 1. Default depends on compile options. Larger 
+numbers need extra resources from the operating system.  For performance a
+a very large value is best, use libevent to make this possible.
 .TP
 .B outgoing\-port\-permit: \fI<port number or range>
 Permit unbound to open this port or range of ports for use to send queries.
@@ -205,7 +206,7 @@ The number of queries that every thread will service simultaneously.
 If more queries arrive that need servicing, and no queries can be jostled out
 (see \fIjostle\-timeout\fR), then the queries are dropped. This forces
 the client to resend after a timeout; allowing the server time to work on
-the existing queries. Default 1024.
+the existing queries. Default depends on compile options, 512 or 1024.
 .TP
 .B jostle\-timeout: \fI<msec>
 Timeout used when the server is very busy.  Set to a value that usually
@@ -972,7 +973,7 @@ server:
 	num\-threads: 1
 	outgoing\-num\-tcp: 1	# this limits TCP service, uses less buffers.
 	incoming\-num\-tcp: 1
-	outgoing\-range: 16	# uses less memory, but less performance.
+	outgoing\-range: 60	# uses less memory, but less performance.
 	msg\-buffer\-size: 8192   # note this limits service, 'no huge stuff'.
 	msg\-cache\-size: 100k
 	msg\-cache\-slabs: 1

util/config_file.c

@@ -90,11 +90,20 @@ config_create(void)
 	cfg->use_syslog = 1;
 	cfg->log_time_ascii = 0;
 #ifndef USE_WINSOCK
-	cfg->outgoing_num_ports = 256;
+#  ifdef USE_MINI_EVENT
+	/* select max 1024 sockets */
+	cfg->outgoing_num_ports = 960;
+	cfg->num_queries_per_thread = 512;
+#  else
+	/* libevent can use many sockets */
+	cfg->outgoing_num_ports = 4096;
+	cfg->num_queries_per_thread = 1024;
+#  endif
 	cfg->outgoing_num_tcp = 10;
 	cfg->incoming_num_tcp = 10;
 #else
 	cfg->outgoing_num_ports = 48; /* windows is limited in num fds */
+	cfg->num_queries_per_thread = 24;
 	cfg->outgoing_num_tcp = 2; /* leaves 64-52=12 for: 4if,1stop,thread4 */
 	cfg->incoming_num_tcp = 2; 
 #endif
@@ -102,7 +111,6 @@ config_create(void)
 	cfg->msg_buffer_size = 65552; /* 64 k + a small margin */
 	cfg->msg_cache_size = 4 * 1024 * 1024;
 	cfg->msg_cache_slabs = 4;
-	cfg->num_queries_per_thread = 1024;
 	cfg->jostle_time = 200;
 	cfg->rrset_cache_size = 4 * 1024 * 1024;
 	cfg->rrset_cache_slabs = 4;