Comments on: Postgres performance speedups, possibly https://www.dragonflydigest.com/2011/10/31/postgres-performance-speedups-possibly/ A running description of activity related to DragonFly BSD. Fri, 04 Nov 2011 18:27:43 +0000 hourly 1 https://wordpress.org/?v=7.0 By: Samuel J. Greear https://www.dragonflydigest.com/2011/10/31/postgres-performance-speedups-possibly/comment-page-1/#comment-43712 Fri, 04 Nov 2011 18:27:43 +0000 http://www.shiningsilence.com/dbsdlog/?p=8615#comment-43712 Petr, the various patches were tentative and now these results are dated, we perform even better than this in master. I plan to do a comparative graph of past dragonfly versions as well as perhaps freebsd or linux around release time.

The big takeaway from this is, green is where we were a few weeks ago, purple is where we were a few days ago, and we are doing even better today.

The big changes between green and purple are: pool locks were added to kqueue subsystem, making the locking there finer grained and the file descriptor table was made finer-grained also.

The big changes between then and now are that the netisr’s can be messaged fully asynchronously and we have a new/updated userland memory allocator, dmalloc, which hasn’t hit the tree yet.

]]> By: Petr https://www.dragonflydigest.com/2011/10/31/postgres-performance-speedups-possibly/comment-page-1/#comment-43711 Fri, 04 Nov 2011 08:34:03 +0000 http://www.shiningsilence.com/dbsdlog/?p=8615#comment-43711 Would be helpful to describe each of the “updates” in the plot, and what they are.

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