[h2] SHUTDOWN COMPACT does not recover space SHUTDOWN DEFRAG take insanely long Opening DB takes 500Mb of space

2016-11-21 Thread Petr HolĂ­k
Hello,

 1.4.192 db, Page Store  1.7GB -> SHUTDOWN COMPACT -> 1.4GB -> open -> 
1.9GB -> SHUTDOWN DEFRAG -> takes on cpu thread(3.5Ghz for maybe two three 
minutes) -> SHUTDOWN COMPACT -> 1.4GB

-> export to SQL ~60MB sql -> import -> ~60MB DB file

Why compact does almost not compact and why opening db takes 500Mb of 
space? I have not investigated ho much data process realy writes to db when 
opening it.(on SSD it looks fast but on rotation disk it takes ages to open 
DB)

Sincerely Petr Holik




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Re: [h2] Data stored in the INFORMATION_SCHEMA.LOBS and INFORMATION_SCHEMA.LOB_MAP tables seems to blow up our database

2016-11-21 Thread Reinhold Bihler
Thanks Noel for you answer. We will try to track down the code / SQL 
statement that causes the growth. What is in your opinion the best approach 
to do so?

I was thinking to write some code that monitors the database file size and 
logs any size change. I would also log any SQL statement sent to the 
database. Doing so I hope we can see a relation between a SQL statement and 
the file growth.

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