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Posted to derby-commits@db.apache.org by Apache Wiki <wi...@apache.org> on 2006/10/20 15:18:23 UTC
[Db-derby Wiki] Update of "Derby1961ResourceUsage" by DyreTjeldvoll
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The following page has been changed by DyreTjeldvoll:
http://wiki.apache.org/db-derby/Derby1961ResourceUsage
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|| 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...