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From: Apache Wiki <wikidiffs@apache.org>
To: derby-commits@db.apache.org
Date: Tue, 17 Oct 2006 11:50:29 -0000
Message-ID: <20061017115029.6823.26553@ajax.apache.org>
Subject: [Db-derby Wiki] Update of "Derby1961ResourceUsage" by
 KnutAndersHatlen
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Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Db-derby Wiki" for change notification.

The following page has been changed by KnutAndersHatlen:
http://wiki.apache.org/db-derby/Derby1961ResourceUsage

------------------------------------------------------------------------------
  
  ==== Object allocation per module ====
  
- These results have been found by running the JVM with the `-agentlib:hprof=heap=sites,...` option and analysing the stack traces that were dumped.
+ These results have been found by running the JVM (Java SE 6.0 - build
+ 1.6.0-rc-b102) with the `-agentlib:hprof=heap=sites,...` option and
+ analysing the stack traces that were dumped.  The numbers are not very
+ accurate (in particular the join results), but they should at least give
+ an impression of how much memory each module allocates.
  
  || '''Module'''   ||<-2> '''Single-record select (20 clients)''' ||<-2> '''Single-record update (10 clients)''' ||<-2> '''Join (4 clients)''' ||
- || Network server ||<style="text-align: right;"> 905 B/tx ||<style="text-align: right;"> 15 objs/tx ||<style="text-align: right;"> 586 B/tx ||<style="text-align: right;"> 13 objs/tx || || ||
+ || Network server ||<style="text-align: right;"> 905 B/tx ||<style="text-align: right;"> 15 objs/tx ||<style="text-align: right;"> 586 B/tx ||<style="text-align: right;"> 13 objs/tx ||<style="text-align: right;"> 68 B/tx ||<style="text-align: right;"> 4 objs/tx ||
- || JDBC           ||<style="text-align: right;"> 416 B/tx ||<style="text-align: right;"> 5 objs/tx || || || || ||
- || Execution      ||<style="text-align: right;"> 1265 B/tx ||<style="text-align: right;"> 21 objs/tx ||<style="text-align: right;"> 2041 B/tx ||<style="text-align: right;"> 33 objs/tx || || ||
- || Access         ||<style="text-align: right;"> 840 B/tx ||<style="text-align: right;"> 25 objs/tx ||<style="text-align: right;"> 921 B/tx ||<style="text-align: right;"> 28 objs/tx || || ||
+ || JDBC           ||<style="text-align: right;"> 416 B/tx ||<style="text-align: right;"> 5 objs/tx || || ||<style="text-align: right;"> 176 B/tx ||<style="text-align: right;"> 3 objs/tx ||
+ || Execution      ||<style="text-align: right;"> 1265 B/tx ||<style="text-align: right;"> 21 objs/tx ||<style="text-align: right;"> 2041 B/tx ||<style="text-align: right;"> 33 objs/tx ||<style="text-align: right;"> 1625 B/tx ||<style="text-align: right;"> 24 objs/tx ||
+ || Access         ||<style="text-align: right;"> 840 B/tx ||<style="text-align: right;"> 25 objs/tx ||<style="text-align: right;"> 921 B/tx ||<style="text-align: right;"> 28 objs/tx ||<style="text-align: right;"> 110756 B/tx ||<style="text-align: right;"> 4093 objs/tx ||
- || Lock manager   ||<style="text-align: right;"> 579 B/tx ||<style="text-align: right;"> 23 objs/tx ||<style="text-align: right;">  707 B/tx ||<style="text-align: right;"> 29 objs/tx || || ||
+ || Lock manager   ||<style="text-align: right;"> 579 B/tx ||<style="text-align: right;"> 23 objs/tx ||<style="text-align: right;">  707 B/tx ||<style="text-align: right;"> 29 objs/tx ||<style="text-align: right;"> 42874 B/tx ||<style="text-align: right;"> 1774 objs/tx||
  || Buffer manager ||  || || || || || ||
  || Logging        ||  || ||<style="text-align: right;"> 93 B/tx ||<style="text-align: right;"> 3 objs/tx || || ||
- || Data store     ||<style="text-align: right;"> 1099 B/tx ||<style="text-align: right;"> 30 objs/tx ||<style="text-align: right;"> 1327 B/tx ||<style="text-align: right;"> 36 objs/tx || || ||
+ || Data store     ||<style="text-align: right;"> 1099 B/tx ||<style="text-align: right;"> 30 objs/tx ||<style="text-align: right;"> 1327 B/tx ||<style="text-align: right;"> 36 objs/tx ||<style="text-align: right;"> 92658 B/tx ||<style="text-align: right;"> 22960 objs/tx ||
- || Transaction control ||<style="text-align: right;"> 80 B/tx ||<style="text-align: right;"> 3 objs/tx ||<style="text-align: right;">  136 B/tx ||<style="text-align: right;"> 6 objs/tx || || ||
+ || Transaction control ||<style="text-align: right;"> 80 B/tx ||<style="text-align: right;"> 3 objs/tx ||<style="text-align: right;">  136 B/tx ||<style="text-align: right;"> 6 objs/tx ||<style="text-align: right;"> 80 B/tx ||<style="text-align: right;"> 3 objs/tx ||
  
  
  More to come...