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From Apache Wiki <wikidi...@apache.org>
Subject [Db-derby Wiki] Update of "Derby1961ResourceUsage" by DyreTjeldvoll
Date Fri, 20 Oct 2006 13:18:23 GMT
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 DyreTjeldvoll:
http://wiki.apache.org/db-derby/Derby1961ResourceUsage

------------------------------------------------------------------------------
  || Unknown             ||<style="text-align: center;">      ||<style="text-align:
center;">         ||<style="text-align: center;">    0.1  ||<style="text-align:
center;">   0.0   ||<style="text-align: center;">   0.8   ||<style="text-align:
center;">    0.0  ||
  
  
+ ==== Disk Access ====
+ 
+ The results in the following table have been found by logging all
+ disk accesses on the database server with DTrace. There are two
+ types of disk access (No reads were observed. Disk accesses for select and join have been
omitted):
+ 
+   * Asynchronous write
+   * Synchronous write
+ 
+ All the numbers are per transaction.
+ 
+ || '''Module'''        ||<-2> '''Single-record update (20 clients)''' ||
+ || ||<style="text-align: center;"> '''Async write''' ||<style="text-align: center;">
'''Sync write''' ||
+ || Logging             ||<style="text-align: center;">  5.5E-6    ||<style="text-align:
center;">    0.30     ||
+ || Data store          ||<style="text-align: center;">  0.06    ||<style="text-align:
center;">   6.6E-5 ||
+ 
  More to come...
  

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