Unix Technical Forum

Re: Design notes for BufMgrLock rewrite

This is a discussion on Re: Design notes for BufMgrLock rewrite within the pgsql Hackers forums, part of the PostgreSQL category; --> > Would there be any value in incrementing by 2 for index accesses and 1 > for seq-scans/vacuums? Actually, ...


Go Back   Unix Technical Forum > Database Server Software > PostgreSQL > pgsql Hackers

FAQ Members List Calendar Search Today's Posts Mark Forums Read
  #1 (permalink)  
Old 04-11-2008, 03:45 AM
Zeugswetter Andreas DAZ SD
 
Posts: n/a
Default Re: Design notes for BufMgrLock rewrite


> Would there be any value in incrementing by 2 for index accesses and 1
> for seq-scans/vacuums? Actually, it should probably be a ratio based on
> random_page_cost shouldn't it?


What happens with very small hot tables that are only a few pages and thus have
no index defined.

I think it would not be good to treat such data pages as less important than
index pages.

Andreas

---------------------------(end of broadcast)---------------------------
TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match

Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump


All times are GMT. The time now is 05:12 PM.


Powered by vBulletin® Version 3.6.5
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.2.0
www.UnixAdminTalk.com