From 7e820f36eb2b2133a06a6fd3ccf8c18c2befe174 Mon Sep 17 00:00:00 2001
From: hno <>
Date: Fri, 21 Jun 2002 18:58:20 +0000
Subject: [PATCH] read_ahead_gap config directive by Jeffrey D. Wheelhouse.
 Allows the read-ahead gap to be configured from squid.conf (previously
 hardcoded at 16 KB)

---
 src/cf.data.pre | 11 ++++++++++-
 src/defines.h   |  4 +---
 src/forward.cc  |  4 ++--
 src/structs.h   |  3 ++-
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/cf.data.pre b/src/cf.data.pre
index f326c042e1..34ff795738 100644
--- a/src/cf.data.pre
+++ b/src/cf.data.pre
@@ -1,6 +1,6 @@
 
 #
-# $Id: cf.data.pre,v 1.262 2002/06/18 10:54:17 hno Exp $
+# $Id: cf.data.pre,v 1.263 2002/06/21 12:58:20 hno Exp $
 #
 #
 # SQUID Web Proxy Cache          http://www.squid-cache.org/
@@ -1639,6 +1639,15 @@ DOC_START
 	cached then set 'quick_abort_min' to '-1 KB'.
 DOC_END
 
+NAME: read_ahead_gap
+COMMENT: buffer-size
+TYPE: kb_size_t
+LOC: Config.readAheadGap
+DEFAULT: 16 KB
+DOC_START
+	The amount of data the cache will buffer ahead of what has been
+	sent to the client when retrieving an object from another server.
+DOC_END
 
 NAME: negative_ttl
 COMMENT: time-units
diff --git a/src/defines.h b/src/defines.h
index aa55f54e37..64c80bf73e 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -1,6 +1,6 @@
 
 /*
- * $Id: defines.h,v 1.103 2002/06/04 15:04:05 hno Exp $
+ * $Id: defines.h,v 1.104 2002/06/21 12:58:20 hno Exp $
  *
  *
  * SQUID Web Proxy Cache          http://www.squid-cache.org/
@@ -178,8 +178,6 @@
 #define ERROR_BUF_SZ (MAX_URL << 2)
 #endif
 
-#define READ_AHEAD_GAP		(1<<14)
-
 #if SQUID_SNMP
 #define VIEWINCLUDED    1
 #define VIEWEXCLUDED    2
diff --git a/src/forward.cc b/src/forward.cc
index 43e7a67485..2dfff334c3 100644
--- a/src/forward.cc
+++ b/src/forward.cc
@@ -1,6 +1,6 @@
 
 /*
- * $Id: forward.cc,v 1.84 2002/04/13 23:07:50 hno Exp $
+ * $Id: forward.cc,v 1.85 2002/06/21 12:58:20 hno Exp $
  *
  * DEBUG: section 17    Request Forwarding
  * AUTHOR: Duane Wessels
@@ -644,7 +644,7 @@ fwdCheckDeferRead(int fd, void *data)
 #endif
     if (EBIT_TEST(e->flags, ENTRY_FWD_HDR_WAIT))
 	return rc;
-    if (mem->inmem_hi - storeLowestMemReaderOffset(e) < READ_AHEAD_GAP)
+    if (mem->inmem_hi - storeLowestMemReaderOffset(e) < Config.readAheadGap)
 	return rc;
     return 1;
 }
diff --git a/src/structs.h b/src/structs.h
index 3580d72909..ff4638a3dd 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1,6 +1,6 @@
 
 /*
- * $Id: structs.h,v 1.419 2002/06/18 22:52:32 hno Exp $
+ * $Id: structs.h,v 1.420 2002/06/21 12:58:20 hno Exp $
  *
  *
  * SQUID Web Proxy Cache          http://www.squid-cache.org/
@@ -384,6 +384,7 @@ struct _SquidConfig {
 	int pct;
 	size_t max;
     } quickAbort;
+    size_t readAheadGap;
     RemovalPolicySettings *replPolicy;
     RemovalPolicySettings *memPolicy;
     time_t referenceAge;
-- 
2.47.3