From 1c83b0a3771bc601fdc75588f2cd45318b19c526 Mon Sep 17 00:00:00 2001
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Sun, 4 Nov 2012 17:11:48 +0100
Subject: Cache size optimizations

---
 src/leveldb.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 'src/leveldb.cpp')

diff --git a/src/leveldb.cpp b/src/leveldb.cpp
index e8a0fbe874..58b75e5295 100644
--- a/src/leveldb.cpp
+++ b/src/leveldb.cpp
@@ -12,22 +12,22 @@
 
 #include <boost/filesystem.hpp>
 
-static leveldb::Options GetOptions() {
+static leveldb::Options GetOptions(size_t nCacheSize) {
     leveldb::Options options;
-    int nCacheSizeMB = GetArg("-dbcache", 25);
-    options.block_cache = leveldb::NewLRUCache(nCacheSizeMB * 1048576);
+    options.block_cache = leveldb::NewLRUCache(nCacheSize / 2);
+    options.write_buffer_size = nCacheSize / 4; // up to two write buffers may be held in memory simultaneously
     options.filter_policy = leveldb::NewBloomFilterPolicy(10);
     options.compression = leveldb::kNoCompression;
     return options;
 }
 
-CLevelDB::CLevelDB(const boost::filesystem::path &path, bool fMemory) {
+CLevelDB::CLevelDB(const boost::filesystem::path &path, size_t nCacheSize, bool fMemory) {
     penv = NULL;
     readoptions.verify_checksums = true;
     iteroptions.verify_checksums = true;
     iteroptions.fill_cache = false;
     syncoptions.sync = true;
-    options = GetOptions();
+    options = GetOptions(nCacheSize);
     options.create_if_missing = true;
     if (fMemory) {
         penv = leveldb::NewMemEnv(leveldb::Env::Default());
-- 
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