Using Buffer Pool Extension

William Wolf talks about Buffer Pool Extension:

With this feature, SQL Server will extend the Buffer Pool Cache to non-volatile(ssd) storage.  This will alleviate the I/O contention of mechanical disks by augmenting memory.  The BPE uses the SSD as memory extension rather than disk.  This feature can be used with standard and enterprise, but would provide noticeable benefits for Standard Edition.  According to books online, the BPE size can be up to 32 times(Enterprise) or 4 times(Standard Edition) the value of max_server_memory, but the recommended ratio is 1:16 or less.

By utilizing this option, we can alleviate some memory pressure.  To demonstrate this for me was a litte difficult at first. My laptop, as most newer laptops, has a SSD. So I plugged in a SATA hard drive externally and moved my database there for testing. If the database files are already on SSD, adding BPE may not give much benefit as the memory from BPE would write to SSD as well.

Buffer Pool Extension did end up in the Hall of Shame, but scenarios like Wolf describes exist, and in those scenarios, BPE could be a viable third-best option.

Related Posts

Restoration With Replacement

Joey D’Antoni tests whether RESTORE WITH REPLACE is functionally different from dropping a database and performing a restoration: I recently read something that said using the RESTORE WITH REPLACE command could be faster than dropping a database and then performing a RESTORE, because the shell of the file could be used and therefore skip file […]

Read More

Automatic Identity Value Reseeding

Tracy Boggiano shows how to build an automated identity column reseeding solution: You have tables that have a lot of data inserted into them and deleted that use identity values and run out integers to use.  I have over 3000+ databases where this can occur so we have an alerts setup that checks the tables […]

Read More

Categories

June 2017
MTWTFSS
« May Jul »
 1234
567891011
12131415161718
19202122232425
2627282930