Whenever I start up jboss, parsing the named queries is one of the time consuming initialization process.
I read a post on hibernate JIRA regarding preparing named query.
It says, instead of writing named queries in mapping files, creating named-query-only-files gives faster startup.
So, I tried it.
Hiberante3 & Jboss4
Num of NamedQuery: 405
Named queries exist within entity mapping(our current status):
| start up time | |
|---|---|
| 1. | 2m:33s:301ms |
| 2. | 2m:15s:737ms |
| 3. | 2m:25s:113ms |
| 4. | 2m:15s:753ms |
| 5. | 2m: 1s:706ms |
| 6. | 2m: 2s:941ms |
| 7. | 2m:19s:722ms |
| 8. | 2m: 8s:769ms |
| 9. | 2m:18s:473ms |
| 10. | 2m:14s: 82ms |
| AVG | 2m:15s:633ms |
Moved approximately half of named query to a query-only-file.
(moving all queries takes time, so I just slacked…)
| start up time | |
|---|---|
| 1. | 1m:52s:300ms |
| 2. | 2m: 7s:191ms |
| 3. | 2m:11s:566ms |
| 4. | 2m: 7s:581ms |
| 5. | 1m:51s:799ms |
| 6. | 2m:19s:613ms |
| 7. | 1m:49s:612ms |
| 8. | 2m: :675ms |
| 9. | 1m:58s: 50ms |
| 10. | 2m:10s:675ms |
| AVG | 2m: 2s:951ms |
::Result::
Average start up time : 2m:15s:633ms => 2m: 2s:951ms
Well, start-up time varies. But surely it makes startup faster.
If I move all named-queries to a couple of query-only-files, we will gain more performance.
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