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Merge pull request #359

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525bf58 Fix estimation of batch storage size when no blocks exist (warptangent)
This commit is contained in:
Riccardo Spagni 2015-08-10 20:02:06 +02:00
commit 9c1ecc6357
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GPG key ID: 55432DF31CCD4FCD
1 changed files with 28 additions and 11 deletions
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25
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -28,6 +28,7 @@
#include "db_lmdb.h"
#include <boost/filesystem.hpp>
#include <boost/format.hpp>
#include <memory> // std::unique_ptr
#include <cstring> // memcpy
#include <random>
@ -262,6 +263,7 @@ void mdb_txn_safe::allow_new_txns()
void BlockchainLMDB::do_resize(uint64_t increase_size)
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
CRITICAL_REGION_LOCAL(m_synchronization_lock);
const uint64_t add_size = 1LL << 30;
@ -327,6 +329,7 @@ void BlockchainLMDB::do_resize(uint64_t increase_size)
// threshold_size is used for batch transactions
bool BlockchainLMDB::need_resize(uint64_t threshold_size) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
#if defined(ENABLE_AUTO_RESIZE)
MDB_envinfo mei;
@ -346,7 +349,8 @@ bool BlockchainLMDB::need_resize(uint64_t threshold_size) const
LOG_PRINT_L1("Space used: " << size_used);
LOG_PRINT_L1("Space remaining: " << mei.me_mapsize - size_used);
LOG_PRINT_L1("Size threshold: " << threshold_size);
LOG_PRINT_L1("Percent used: " << (double)size_used/mei.me_mapsize << " Percent threshold: " << RESIZE_PERCENT);
float resize_percent_old = RESIZE_PERCENT;
LOG_PRINT_L1(boost::format("Percent used: %.04f Percent threshold: %.04f") % ((double)size_used/mei.me_mapsize) % resize_percent_old);
if (threshold_size > 0)
{
@ -376,7 +380,8 @@ bool BlockchainLMDB::need_resize(uint64_t threshold_size) const
void BlockchainLMDB::check_and_resize_for_batch(uint64_t batch_num_blocks)
{
LOG_PRINT_L1("[batch] checking DB size");
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
LOG_PRINT_L1("[" << __func__ << "] " << "checking DB size");
const uint64_t min_increase_size = 128 * (1 << 20);
uint64_t threshold_size = 0;
uint64_t increase_size = 0;
@ -407,6 +412,7 @@ void BlockchainLMDB::check_and_resize_for_batch(uint64_t batch_num_blocks)
uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) const
{
LOG_PRINT_L3("BlockchainLMDB::" << __func__);
uint64_t threshold_size = 0;
// batch size estimate * batch safety factor = final size estimate
@ -419,12 +425,22 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
// For resizing purposes, allow for at least 4k average block size.
uint64_t min_block_size = 4 * 1024;
uint64_t block_stop = m_height - 1;
uint64_t block_stop = 0;
if (m_height > 1)
block_stop = m_height - 1;
uint64_t block_start = 0;
if (block_stop >= num_prev_blocks)
block_start = block_stop - num_prev_blocks + 1;
uint32_t num_blocks_used = 0;
uint64_t total_block_size = 0;
LOG_PRINT_L1("[" << __func__ << "] " << "m_height: " << m_height << " block_start: " << block_start << " block_stop: " << block_stop);
size_t avg_block_size = 0;
if (m_height == 0)
{
LOG_PRINT_L1("No existing blocks to check for average block size");
}
else
{
for (uint64_t block_num = block_start; block_num <= block_stop; ++block_num)
{
uint32_t block_size = get_block_size(block_num);
@ -433,8 +449,9 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
// some blocks were to be skipped for being outliers.
++num_blocks_used;
}
size_t avg_block_size = total_block_size / num_blocks_used;
avg_block_size = total_block_size / num_blocks_used;
LOG_PRINT_L1("average block size across recent " << num_blocks_used << " blocks: " << avg_block_size);
}
if (avg_block_size < min_block_size)
avg_block_size = min_block_size;
LOG_PRINT_L1("estimated average block size for batch: " << avg_block_size);