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From "Lionel Cons (JIRA)" <j...@apache.org>
Subject [jira] [Created] (APLO-245) The LevelDB store does not seem to get cleaned/compacted
Date Fri, 17 Aug 2012 08:14:38 GMT
Lionel Cons created APLO-245:
--------------------------------

             Summary: The LevelDB store does not seem to get cleaned/compacted
                 Key: APLO-245
                 URL: https://issues.apache.org/jira/browse/APLO-245
             Project: ActiveMQ Apollo
          Issue Type: Bug
            Reporter: Lionel Cons


We use the default message store: LevelDB.

On one broker with poor performance, we noticed a quite big store (file system wise) while
there are zero messages in the queues.

In concrete terms, the REST API reports for the aggregated dest-metrics:

  'queue_items' => 0,
  'queue_size' => 0,

While on the box itself, in the data directory, we see:

$ du -ks .
434992	.
$ find . -type f | wc -l
471

So 400MB and 471 files is a lot to hold zero messages...

FWIW, the store page in the console reports something quite different:

disk usage: 760.689 mb

Log Status

Log File             | Msg Refs   | File Size 
0000003a0eb4031b.log | 0          | 100.000 mb

Index recovery starts from log position: 0000003a0eb4031b

Append position: 0000003a13bed684
Index Status

                               Compactions
Level  Files Size(MB) Time(sec) Read(MB) Write(MB)
--------------------------------------------------
  0        0        0         0        0         2
  1        7        9         2       12         9
  2      108       91         0        0         0
  3      114      227         0        0         0


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