P.C.Sun created JCR-3333:
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Summary: The binary file entities are stored twice in the DB
Key: JCR-3333
URL: https://issues.apache.org/jira/browse/JCR-3333
Project: Jackrabbit Content Repository
Issue Type: Bug
Components: JCR 2.0
Environment: Windows 7, Linux
Reporter: P.C.Sun
We are using JCR in Liferay to store documents, which means all documents store
in DB in binary. As these days, we found the size of DB is increasing very
fast. So we run the SQL to get size of documents. The SQLs are like:
1. select sum(size_) from dlfileentry(liferay table to store file meta data,
such as name, size); -> All documents size recorded in dlentry table:
The result is: 43330765874, which means around 40.36 GB
2. The DB size report is: around 95.97 GB.
3. Within these tables, there are two very big tables:
j_pm_liferay_binval -> 52.07GB
j_v_pm_binval -> 43.65 GB
So the question is: if the document itself is only around 40.36 GB, what are
those two tables storing? From the table itself, they are the all binval
tables...Does it mean every document is stored twice or something. What's
inside those tables?
In this case, the DB increase around 30 GB within 3 months, really fast, any
suggestion to improve this?
As replied from Liferay: the table j_v_pm_binaval is to store the file version.
However, for the new document, it's also stored, which we think it should be
created only when a new version is generated. They also mentioned to solve this
we need to change repository.xml, however, we don't have the answer how to deal
with the old files, whether they will get lost if we change the config file.
Please let me know whether it is possible to clean them in DB?
Thank you very much and looking forwards to your reply.
Best Regards.
P.C.(JACK) SUN
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