View Single Post
  #7  
Old 06-27-2005, 03:53 PM
Marco van Herwaarden Marco van Herwaarden is offline
 
Join Date: Jul 2004
Posts: 25,415
Благодарил(а): 0 раз(а)
Поблагодарили: 0 раз(а) в 0 сообщениях
Default

Well the number of returning rows don't always say something about the number of rows MySQL has to process, select, join and sort, before it can return that number of rows.

A select with a '...FROM singletable WHERE column = 1' that would select 75 out of the 150 rows, would be very fast.

Selecting from multiple big tables, joining on nonunique fields, sorting, etc, still returning 75 rows could be very time consuming.
Reply With Quote
 
X vBulletin 3.8.12 by vBS Debug Information
  • Page Generation 0.01241 seconds
  • Memory Usage 1,754KB
  • Queries Executed 11 (?)
More Information
Template Usage:
  • (1)SHOWTHREAD_SHOWPOST
  • (1)ad_footer_end
  • (1)ad_footer_start
  • (1)ad_header_end
  • (1)ad_header_logo
  • (1)ad_navbar_below
  • (1)footer
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (6)option
  • (1)post_thanks_box
  • (1)post_thanks_button
  • (1)post_thanks_javascript
  • (1)post_thanks_navbar_search
  • (1)post_thanks_postbit_info
  • (1)postbit
  • (1)postbit_onlinestatus
  • (1)postbit_wrapper
  • (1)spacer_close
  • (1)spacer_open 

Phrase Groups Available:
  • global
  • postbit
  • reputationlevel
  • showthread
Included Files:
  • ./showpost.php
  • ./global.php
  • ./includes/init.php
  • ./includes/class_core.php
  • ./includes/config.php
  • ./includes/functions.php
  • ./includes/class_hook.php
  • ./includes/modsystem_functions.php
  • ./includes/functions_bigthree.php
  • ./includes/class_postbit.php
  • ./includes/class_bbcode.php
  • ./includes/functions_reputation.php
  • ./includes/functions_post_thanks.php 

Hooks Called:
  • init_startup
  • init_startup_session_setup_start
  • init_startup_session_setup_complete
  • cache_permissions
  • fetch_postinfo_query
  • fetch_postinfo
  • fetch_threadinfo_query
  • fetch_threadinfo
  • fetch_foruminfo
  • style_fetch
  • cache_templates
  • global_start
  • parse_templates
  • global_setup_complete
  • showpost_start
  • bbcode_fetch_tags
  • bbcode_create
  • postbit_factory
  • showpost_post
  • postbit_display_start
  • post_thanks_function_post_thanks_off_start
  • post_thanks_function_post_thanks_off_end
  • post_thanks_function_fetch_thanks_start
  • post_thanks_function_fetch_thanks_end
  • post_thanks_function_thanked_already_start
  • post_thanks_function_thanked_already_end
  • fetch_musername
  • postbit_imicons
  • bbcode_parse_start
  • bbcode_parse_complete_precache
  • bbcode_parse_complete
  • postbit_display_complete
  • post_thanks_function_can_thank_this_post_start
  • showpost_complete