Hello Thomas, it makes a sense we are using CLOBs in our database extensively. And it often ends with Missing LOB entry(which i've reported on github) or database with wasted space (after deleting data mostly from table which contains CLOBs). Propably is something broken in H2 in handling (C)LOB. We have customers the that ends up with databases which contains multiple rows with same unique constraint we have even databases with same(duplicate) primary key(maybe it is fixed now, I don't know) but we can hardly make a test case if customer is using this database daily for 3 years. But missing LOB appears even in 1.4.192. Last month we have 3 issue on this.
I am sorry to say that, but we are now migrating to alternative embedded java database. We are going to create some stress test and we will run it against H2 too. If it ends with missing or non referenced LOB i'll let you know. Sincerely Petr Holik 2016-11-24 18:01 GMT+01:00 Thomas Mueller Graf <[email protected] >: > Hi, > > It could be due to LOG data (BLOB, CLOB) that are not referenced, and not > correctly garbage collected. To analyze that, we would need a reproducible > test case. > > To find out, you could use the Recover tool on the large database. > > Regards, > Thomas > > > > On Tuesday, November 22, 2016, Petr Holík <[email protected]> wrote: > >> 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 >> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "H2 Database" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at https://groups.google.com/group/h2-database. >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "H2 Database" group. > To unsubscribe from this topic, visit https://groups.google.com/d/ > topic/h2-database/3P-4fvsgKss/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/h2-database. > For more options, visit https://groups.google.com/d/optout. > -- S pozdravem Petr Holik tel. 774 22 90 90 -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.
