Applies to: SQL Server Introduced in SQL Server 2014 (12.x), the buffer pool extension provides the seamless integration of a nonvolatile random access memory (that is, solid-state drive) extension to the Database Engine buffer pool to significantly improve I/O throughput. The buffer pool ...
从如上执行结果可以看出,58757 页对应的is_in_bpool_extension值为1,说明该页存储在Buffer Pool 扩展上。 执行查询语句,查看IO信息,如下图: 从上图可以看出,当数据在Buffer Pool 扩展有缓存时,该查询执行了0次物理读。 从上图可以看出,该语句读持续了49毫秒。 结论 通过同一环境中的如上三个场景测试,测试结果...
ALTER SERVER CONFIGURATION SET BUFFER POOL EXTENSION OFF GO ALTER SERVER CONFIGURATION SET BUFFER POOL EXTENSION ON ( FILENAME = N'E:\os_file_path_and_name.BPE' , SIZE = 4GB) GO 1. 2. 3. 4. 5. 6. 7. 缓冲池扩展信息,可以查看以下 DMV: 代码解析 SELECT * FROM sys.dm_os_buffer_po...
The answer we come up with is Buffer Pool Extension feature (BPE) that targets nonvolatile storage devices, in particular SSD drives, as an extension for SQL Server buffer pool. Those devices have some advantages over direct memory increase: the first one, already mentioned above, is the highe...
SQL Server 2014缓存池扩展 (Buffer Pool Extension)功能可以将缓存池扩展到较快的SSD存储上。为内存比较紧张的系统提供了新的扩展途径。 Buffer Pool 扩展可以带来以下好处: 提高随机I/O的吞吐量 降低I/O延迟 提高单位时间内处理事务的吞吐量 显著地提高读性能 ...
SQL Server 2014缓存池扩展 (Buffer Pool Extension)功能可以将缓存池扩展到较快的SSD存储上。为内存比较紧张的系统提供了新的扩展途径。 Buffer Pool 扩展可以带来以下好处。 1. 提高随机I/O的吞吐量 2. 降低I/O延迟 3. 提高单位时间内处理事务的吞吐量 ...
--Review current BPE configuration SELECT [path], state_description,current_size_in_kb,CAST(current_size_in_kb/1048576.0 As DECIMAL (10,2)) AS [Size (GB)] FROM sys.dm_os_buffer_pool_extension_configuration; --Reduce SQL Server Max memory to restrict the BP and force the use of BPE EX...
Returns configuration information about the buffer pool extension in SQL Server. Returns one row for each buffer pool extension file.Kembangkan jadual Column nameData typeDescription path nvarchar(256) Path and file name of the buffer pool extension cache. Nullable...
<Date> <Time> Server Buffer pool extension size must be larger than the physical memory size <max server memory specified> MB. Buffer pool extension is not enabled. After the SQL Server 2014 SP1 is applied, in addition to the message in the SQL error log, you will also receiv...
清除BUFFER POOL缓存会对SQL Server的性能产生一定的影响,主要体现在以下几个方面: 性能下降:清除BUFFER POOL缓存后,SQL Server需要从磁盘中读取数据,而不是从内存中获取。这会导致性能下降,因为磁盘访问速度通常比内存访问速度慢。 缓存重建:当BUFFER POOL缓存被清除后,SQL Server需要重新缓存数据页面。这个过程可能会...