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Memory存儲引擎官方服裝論壇t.vhao.net： http://forums.mysql.com/list.php?92
機能測試
寫入10000筆記錄比擬。
讀取1000筆記錄比擬。
測試劇本：
/******************************************************
MYSQL STORAGE ENGINE TEST
http://wu-jian.cnblogs.com/
2011-11-29
******************************************************/
CREATE DATABASE IF NOT EXISTS test
CHARACTER SET 'utf8'
COLLATE 'utf8_general_ci';
USE test;
/******************************************************
1.INNODB
******************************************************/
DROP TABLE IF EXISTS test_innodb;
CREATE TABLE IF NOT EXISTS test_innodb (
id INT UNSIGNED AUTO_INCREMENT COMMENT 'PK',
obj CHAR(255) NOT NULL DEFAULT '' COMMENT 'OBJECT',
PRIMARY KEY (id)
) ENGINE=INNODB;
/******************************************************
2.MYISAM
******************************************************/
DROP TABLE IF EXISTS test_myisam;
CREATE TABLE IF NOT EXISTS test_myisam (
id INT UNSIGNED AUTO_INCREMENT COMMENT 'PK',
obj CHAR(255) NOT NULL DEFAULT '' COMMENT 'OBJECT',
PRIMARY KEY (id)
) ENGINE=MYISAM;
/******************************************************
1.MEMORY
******************************************************/
DROP TABLE IF EXISTS test_memory;
CREATE TABLE IF NOT EXISTS test_memory (
id INT UNSIGNED AUTO_INCREMENT COMMENT 'PK',
obj CHAR(255) NOT NULL DEFAULT '' COMMENT 'OBJECT',
PRIMARY KEY (id)
) ENGINE=MEMORY;
測試代碼：
using System;
using System.Data;
using MySql.Data.MySqlClient;
namespace MySqlEngineTest
{
class Program
{
const string OBJ = "The MEMORY storage engine creates tables with contents that are stored in memory. Formerly, these were known as HEAP tables. MEMORY is the preferred term, although HEAP remains supported for backward compatibility.";
const string SQL_CONN = "Data Source=127.0.0.1;Port=3308;User ID=root;Password=root;DataBase=test;Allow Zero Datetime=true;Charset=utf8;pooling=true;";
const int LOOP_TOTAL = 10000;
const int LOOP_BEGIN = 8000;
const int LOOP_END = 9000;
#region Database Functions
public static bool DB_InnoDBInsert(string obj)
{
string commandText = "INSERT INTO test_innodb (obj) VALUES (?obj)";
MySqlParameter[] parameters = {
new MySqlParameter("?obj", MySqlDbType.VarChar, 255)
};
parameters[0].Value = obj;
if (DBUtility.MySqlHelper.ExecuteNonQuery(SQL_CONN, CommandType.Text, commandText, parameters) > 0)
return true;
else
return false;
}
public static string DB_InnoDBSelect(int id)
{
string commandText = "SELECT obj FROM test_innodb WHERE id = ?id";
MySqlParameter[] parameters = {
new MySqlParameter("?id", MySqlDbType.Int32)
};
parameters[0].Value = id;
return DBUtility.MySqlHelper.ExecuteScalar(SQL_CONN, CommandType.Text, commandText, parameters).ToString();
}
public static bool DB_MyIsamInsert(string obj)
{
string commandText = "INSERT INTO test_myisam (obj) VALUES (?obj)";
MySqlParameter[] parameters = {
new MySqlParameter("?obj", MySqlDbType.VarChar, 255)
};
parameters[0].Value = obj;
if (DBUtility.MySqlHelper.ExecuteNonQuery(SQL_CONN, CommandType.Text, commandText, parameters) > 0)
return true;
else
return false;
}
public static string DB_MyIsamSelect(int id)
{
string commandText = "SELECT obj FROM test_myisam WHERE id = ?id";
MySqlParameter[] parameters = {
new MySqlParameter("?id", MySqlDbType.Int32)
};
parameters[0].Value = id;
return DBUtility.MySqlHelper.ExecuteScalar(SQL_CONN, CommandType.Text, commandText, parameters).ToString();
}
public static bool DB_MemoryInsert(string obj)
{
string commandText = "INSERT INTO test_memory (obj) VALUES (?obj)";
MySqlParameter[] parameters = {
new MySqlParameter("?obj", MySqlDbType.VarChar, 255)
};
parameters[0].Value = obj;
if (DBUtility.MySqlHelper.ExecuteNonQuery(SQL_CONN, CommandType.Text, commandText, parameters) > 0)
return true;
else
return false;
}
public static string DB_MemorySelect(int id)
{
string commandText = "SELECT obj FROM test_memory WHERE id = ?id";
MySqlParameter[] parameters = {
new MySqlParameter("?id", MySqlDbType.Int32)
};
parameters[0].Value = id;
return DBUtility.MySqlHelper.ExecuteScalar(SQL_CONN, CommandType.Text, commandText, parameters).ToString();
}
#endregion
#region Test Functions InnoDB
static void InnoDBInsert()
{
long begin = DateTime.Now.Ticks;
for (int i = 0; i < LOOP_TOTAL; i++)
{
DB_InnoDBInsert(OBJ);
}
Console.WriteLine("InnoDB Insert Result: {0}", DateTime.Now.Ticks - begin);
}
static void InnoDBSelect()
{
long begin = DateTime.Now.Ticks;
for (int i = LOOP_BEGIN; i < LOOP_END; i++)
{
DB_InnoDBSelect(i);
}
Console.WriteLine("InnoDB SELECT Result: {0}", DateTime.Now.Ticks - begin);
}
static void MyIsamInsert()
{
long begin = DateTime.Now.Ticks;
for (int i = 0; i < LOOP_TOTAL; i++)
{
DB_MyIsamInsert(OBJ);
}
Console.WriteLine("MyIsam Insert Result: {0}", DateTime.Now.Ticks - begin);
}
static void MyIsamSelect()
{
long begin = DateTime.Now.Ticks;
for (int i = LOOP_BEGIN; i < LOOP_END; i++)
{
DB_MyIsamSelect(i);
}
Console.WriteLine("MyIsam SELECT Result: {0}", DateTime.Now.Ticks - begin);
}
static void MemoryInsert()
{
long begin = DateTime.Now.Ticks;
for (int i = 0; i < LOOP_TOTAL; i++)
{
DB_MemoryInsert(OBJ);
}
Console.WriteLine("Memory Insert Result: {0}", DateTime.Now.Ticks - begin);
}
static void MemorySelect()
{
long begin = DateTime.Now.Ticks;
for (int i = LOOP_BEGIN; i < LOOP_END; i++)
{
DB_MemorySelect(i);
}
Console.WriteLine("Memory SELECT Result: {0}", DateTime.Now.Ticks - begin);
}
static void DataTableInsertAndSelect()
{
//Insert
DataTable dt = new DataTable();
dt.Columns.Add("id", Type.GetType("System.Int32"));
dt.Columns["id"].AutoIncrement = true;
dt.Columns.Add("obj", Type.GetType("System.String"));
DataRow dr = null;
long begin = DateTime.Now.Ticks;
for (int i = 0; i < LOOP_TOTAL; i++)
{
dr = null;
dr = dt.NewRow();
dr["obj"] = OBJ;
dt.Rows.Add(dr);
}
Console.WriteLine("DataTable Insert Result: {0}", DateTime.Now.Ticks - begin);
//Select
long begin1 = DateTime.Now.Ticks;
for (int i = LOOP_BEGIN; i < LOOP_END; i++)
{
dt.Select("id = " + i);
}
Console.WriteLine("DataTable Select Result: {0}", DateTime.Now.Ticks - begin1);
}
#endregion
static void Main(string[] args)
{
InnoDBInsert();
InnoDBSelect();
//restart mysql to avoid query cache
MyIsamInsert();
MyIsamSelect();
//restart mysql to avoid query cache
MemoryInsert();
MemorySelect();
DataTableInsertAndSelect();
}
}//end class
}
總結
.Net Cache讀寫機能毫無疑問年夜年夜搶先於數據庫引擎
InnoDB寫入耗時年夜概是MyIsam和Memory的5倍閣下，它的行鎖機制必定決議了寫入時的更多機能開支，而它的強項在於多線程的並發處置，而本測試未能表現其優勢。
三種數據庫引擎在SELECT機能上差不多，Memory稍占優，異樣高並發下的比擬有待進一步測試。
