| From: | jwieck(at)debis(dot)com (Jan Wieck) |
|---|---|
| To: | maillist(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian) |
| Cc: | maillist(at)candle(dot)pha(dot)pa(dot)us, tgl(at)sss(dot)pgh(dot)pa(dot)us, jwieck(at)debis(dot)com, hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] Postgres Speed or lack thereof |
| Date: | 1999-03-15 21:09:25 |
| Message-ID: | m10Mec1-000EBxC@orion.SAPserv.Hamburg.dsh.de |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
>
> Can someone remind me where we left this memory context stuff?
>
I've changed AllocSetAlloc() and friends to manage small
allocations in bigger blocks together where the sizes are
round up to powers of two and free's chunks in the blocks are
reused in place. The entire blocks get only free'd when they
get completely free.
Then I've changed palloc() etc. into macros (which started
the discussion on mcxt.h - sorry).
Overall speedup from the changes (for regression) is
something about 10-15%.
Jan
--
#======================================================================#
# It's easier to get forgiveness for being wrong than for being right. #
# Let's break this rule - forgive me. #
#======================================== jwieck(at)debis(dot)com (Jan Wieck) #
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