Hello, The attached patch implements huge_pages on Windows. I'll add this to the CommitFest.
The performance improvement was about 2% with the following select-only pgbench. The scaling factor is 200, where the database size is roughly 3GB. I ran the benchmark on my Windows 10 PC with 6 CPU cores and 16GB of RAM. pgbench -c18 -j6 -T60 -S bench Before running pgbench, I used pg_prewarm to cache all pgbench tables and indexes (excluding the history table) in the 4GB shared buffers. The averages of running pgbench three times are: huge_pages=off: 70412 tps huge_pages=on : 72100 tps The purpose of pg_ctl.c modification is to retain "Lock pages in memory" Windows user right in postgres. That user right is necessary for the large-page support. The current pg_ctl removes all privileges when spawning postgres, which is overkill. The system administrator should be able to assign appropriate privileges to the PostgreSQL service account. Credit: This patch is based on Thomas Munro's one. Regards Takayuki Tsunakawa
win_large_page.patch
Description: win_large_page.patch
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