From 259d7deb66f27b549a902fd5d753a54e0ec0db28 Mon Sep 17 00:00:00 2001
From: "tomas@whalegate.ndb.mysql.com" <>
Date: Thu, 24 May 2007 21:02:01 +0200
Subject: [PATCH] Bug #28653    Fast GCP + high load + high RedoBuffer causes
 ndbrequire - correction, use recomputed _actual_ redobuffer

---
 ndb/src/kernel/blocks/dblqh/Dblqh.hpp     | 5 +++--
 ndb/src/kernel/blocks/dblqh/DblqhInit.cpp | 4 ++--
 ndb/src/kernel/blocks/dblqh/DblqhMain.cpp | 5 +++++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/ndb/src/kernel/blocks/dblqh/Dblqh.hpp b/ndb/src/kernel/blocks/dblqh/Dblqh.hpp
index 4474d226a27..2ed08db527c 100644
--- a/ndb/src/kernel/blocks/dblqh/Dblqh.hpp
+++ b/ndb/src/kernel/blocks/dblqh/Dblqh.hpp
@@ -2668,7 +2668,8 @@ private:
   UintR cfirstfreeLogFile;
   UintR clogFileFileSize;
 
-#define ZLFO_FILE_SIZE 256            /* MAX 256 OUTSTANDING FILE OPERATIONS */
+#define ZLFO_MIN_FILE_SIZE 256
+// RedoBuffer/32K minimum ZLFO_MIN_FILE_SIZE
   LogFileOperationRecord *logFileOperationRecord;
   LogFileOperationRecordPtr lfoPtr;
   UintR cfirstfreeLfo;
@@ -2685,7 +2686,7 @@ private:
   UintR cfirstfreePageRef;
   UintR cpageRefFileSize;
 
-#define ZSCANREC_FILE_SIZE 100
+// Configurable
   ArrayPool<ScanRecord> c_scanRecordPool;
   ScanRecordPtr scanptr;
   UintR cscanNoFreeRec;
diff --git a/ndb/src/kernel/blocks/dblqh/DblqhInit.cpp b/ndb/src/kernel/blocks/dblqh/DblqhInit.cpp
index 3452269be51..65f4b0f9b4b 100644
--- a/ndb/src/kernel/blocks/dblqh/DblqhInit.cpp
+++ b/ndb/src/kernel/blocks/dblqh/DblqhInit.cpp
@@ -32,11 +32,11 @@ void Dblqh::initData()
   chostFileSize = MAX_NDB_NODES;
   clcpFileSize = ZNO_CONCURRENT_LCP;
   clcpLocrecFileSize = ZLCP_LOCREC_FILE_SIZE;
-  clfoFileSize = ZLFO_FILE_SIZE;
+  clfoFileSize = 0;
   clogFileFileSize = 0;
   clogPartFileSize = ZLOG_PART_FILE_SIZE;
   cpageRefFileSize = ZPAGE_REF_FILE_SIZE;
-  cscanrecFileSize = ZSCANREC_FILE_SIZE;
+  cscanrecFileSize = 0;
   ctabrecFileSize = 0;
   ctcConnectrecFileSize = 0;
   ctcNodeFailrecFileSize = MAX_NDB_NODES;
diff --git a/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp b/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp
index 684598364ab..88bc3f372a5 100644
--- a/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp
+++ b/ndb/src/kernel/blocks/dblqh/DblqhMain.cpp
@@ -7251,6 +7251,11 @@ void Dblqh::continueScanNextReqLab(Signal* signal)
     return;
   }
 
+  /* maximum number of log file operations */
+  clfoFileSize = clogPageFileSize;
+  if (clfoFileSize < ZLFO_MIN_FILE_SIZE)
+    clfoFileSize = ZLFO_MIN_FILE_SIZE;
+
   // Update timer on tcConnectRecord
   tcConnectptr.p->tcTimer = cLqhTimeOutCount;
   init_acc_ptr_list(scanptr.p);