mssqlserver2016内存表测试

测试环境:

windows2012, sqlserver2016, 64G内存的pc服务器,接口:c# .netframework4.6

内存表是:schema_only

测试程序和数据库服务器在同一主机

 

插入10万条guid字符串(ID列),纯单条insert语句插入:

磁盘表:57s

内存表:12s

 

根据表主键ID查询1000次ID并汇总时间:

磁盘表:170ms  (直接select id, bh where id='333')

内存表:170ms(直接select id, bh where id='333')

内存表:250ms (本地编译的存储过程,"p1 {lst[m]} )

内存表:170ms  (本地编译的存储过程,  cmd.Parameters[0].Value = lst[0];) 

 

结论:

插入速度提高很多,如果按照本地编译存储过程,可能插入更快,参考:https://blog.csdn.net/yenange/article/details/32705347

查询速度,是否用本地编译的存储过程,感觉差不多,我主要是想模拟key-value情况,查询也是按主键查询的,速度和磁盘表没有明显变化

考虑到内存表的诸多限制,如表长度不超过8000多,也不清楚内存何时释放,有人说只有drop表时也释放,delete 表中记录是不释放内存占用的。

还不如直接用磁盘表方便可控

 

代码参考:

  private void button3_Click(object sender, EventArgs e)
        {
            lst.Clear();
            for(int m=0;m<100000;m++)
            {
                lst.Add(Guid.NewGuid().ToString());
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //普通表插入
            this.插入表("table_1");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            //普通表查询
            SqlConnection cn = new System.Data.SqlClient.SqlConnection(cnstr);
            cn.Open();
            SqlCommand cmd = cn.CreateCommand();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            DateTime t = DateTime.Now;
            for (int m=0;m<1000;m++)
            {
                cmd.CommandText = $"select * from table_1 where id ='{lst[m]}'";
                da.Fill(ds, "t");
            }
            cn.Close();

            this.textBox1.Text = (DateTime.Now - t).TotalMilliseconds.ToString();
        }

        private void button5_Click(object sender, EventArgs e)
        {
            //内存表插入
            this.插入表("t_mem");
        }

        private void button4_Click(object sender, EventArgs e)
        {
            //内在表查询
            SqlConnection cn = new System.Data.SqlClient.SqlConnection(cnstr);
            cn.Open();
            SqlCommand cmd = cn.CreateCommand();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            DateTime t = DateTime.Now;
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = $"p1";
            cmd.Parameters.Add("@id", SqlDbType.VarChar);
            for (int m = 0; m < 1000; m++)
            {
                cmd.Parameters[0].Value = lst[0];
                da.Fill(ds, "t");
            }
            cn.Close();

            this.textBox1.Text = (DateTime.Now - t).TotalMilliseconds.ToString();



            //SqlConnection cn = new System.Data.SqlClient.SqlConnection(cnstr);
            //cn.Open();
            //SqlCommand cmd = cn.CreateCommand();
            //SqlDataAdapter da = new SqlDataAdapter(cmd);
            //DataSet ds = new DataSet();
            //DateTime t = DateTime.Now;
            //for (int m = 0; m < 1000; m++)
            //{
            //    cmd.CommandText = $"p1 {lst[m]}'";
            //    da.Fill(ds, "t");
            //}
            //cn.Close();

            //this.textBox1.Text = (DateTime.Now - t).TotalMilliseconds.ToString();

            //SqlConnection cn = new System.Data.SqlClient.SqlConnection(cnstr);
            //cn.Open();
            //SqlCommand cmd = cn.CreateCommand();
            //SqlDataAdapter da = new SqlDataAdapter(cmd);
            //DataSet ds = new DataSet();
            //DateTime t = DateTime.Now;
            //for (int m = 0; m < 1000; m++)
            //{
            //    cmd.CommandText = $"select * from t_mem where id ='{lst[m]}'";
            //    da.Fill(ds, "t");
            //}
            //cn.Close();

            //this.textBox1.Text = (DateTime.Now - t).TotalMilliseconds.ToString();
        }

        private void 插入表(string tab)
        {
            SqlConnection cn = new System.Data.SqlClient.SqlConnection(cnstr);
            cn.Open();
            SqlCommand cmd = cn.CreateCommand();
            DateTime t = DateTime.Now;
            foreach (string str in lst)
            {
                cmd.CommandText = $"insert into {tab}(id,bh) values('{str}','2')";
                cmd.ExecuteNonQuery();
            }
            cn.Close();

            this.textBox1.Text = (DateTime.Now - t).TotalMilliseconds.ToString();
        }
    }
}

 

posted @ 2020-05-04 15:39  81  阅读(931)  评论(0编辑  收藏  举报