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Posted to derby-dev@db.apache.org by "Kristian Waagan (Issue Comment Edited) (JIRA)" <ji...@apache.org> on 2012/03/29 15:32:27 UTC
[jira] [Issue Comment Edited] (DERBY-5083) Document automatic
update and creation of index cardinality statistics (istat)
[ https://issues.apache.org/jira/browse/DERBY-5083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13241202#comment-13241202 ]
Kristian Waagan edited comment on DERBY-5083 at 3/29/12 1:32 PM:
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The properties can be set on both the system-wide and database level (the latter overriding the former).
The properties are static.
I believe derby.storage.indexStats.trace should be exposed - it provides valuable information when you have to debug problems with the feature. Take care of the valid values for the trace property: "none" (the default), "stdout", "log", "both".
was (Author: kristwaa):
The properties can be set on both the system-wide and database level.
The properties are static.
I believe derby.storage.indexStats.trace should be exposed - it provides valuable information when you have to debug problems with the feature. Take care of the valid values for the trace property: "none" (the default), "stdout", "log", "both".
> Document automatic update and creation of index cardinality statistics (istat)
> ------------------------------------------------------------------------------
>
> Key: DERBY-5083
> URL: https://issues.apache.org/jira/browse/DERBY-5083
> Project: Derby
> Issue Type: Task
> Components: Documentation
> Affects Versions: 10.8.1.2
> Reporter: Kim Haase
> Assignee: Kim Haase
>
> Documentation is needed for the automatic index statistics feature (DERBY-4934). It appears that a change is needed to the Tuning Guide topic "When cardinality statistics are automatically updated", at least.
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