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From "Patrick Linskey (JIRA)" <j...@apache.org>
Subject [jira] Commented: (OPENJPA-407) Cache SQL (or closer precursors to SQL) more aggressively
Date Wed, 17 Oct 2007 23:03:50 GMT

    [ https://issues.apache.org/jira/browse/OPENJPA-407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12535777
] 

Patrick Linskey commented on OPENJPA-407:
-----------------------------------------

I'm having a hard time reproducing both the 7.5 and the 5.5 numbers; I'm seeing numbers around
9 minutes for both clean trunk and my patch + prototype. The new stuff seems to be running
a small amount faster, but not as much as I saw before. Odd.

It is probably worthwhile to create a microbenchmark that exercises these pathways and try
it out with that directly, instead of trying to infer something from our existing test execution
speed.

> Cache SQL (or closer precursors to SQL) more aggressively
> ---------------------------------------------------------
>
>                 Key: OPENJPA-407
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-407
>             Project: OpenJPA
>          Issue Type: Improvement
>          Components: jdbc, kernel, query, sql
>    Affects Versions: 0.9.0, 0.9.6, 0.9.7, 1.0.0
>            Reporter: Patrick Linskey
>             Fix For: 1.1.0
>
>         Attachments: OPENJPA-407.patch
>
>
> When data is not available in the data cache, OpenJPA dynamically creates SQL to look
up the requested data. OpenJPA should more aggressively cache this SQL to accelerate pathways
from a cache miss to the database.
> The generated SQL takes a number of factors into account, including the requested records,
transaction status, currently-loaded data, and the current fetch configuration. Any caching
would need to account for these factors as well.

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