Re: Database Stability Issues

2011-11-30 Thread Thomas Mueller
Hi, > 2) My second issue is that of a long start up time I guess there is a connection with an open transaction (an uncommitted change) that is blocking the transaction log to shrink. Or multiple connections. This would also explain why it gets slower over time. To find out, you could use: j

Re: Database Stability Issues

2011-11-30 Thread andreis
> How can I truncate the log without starting the database over from> scratch? CHECKPOINT http://www.h2database.com/html/grammar.html#checkpoint and probably http://www.h2database.com/html/grammar.html#set_max_log_size At least in my case, when time to create an index is about 50sec and every index

Re: Database Stability Issues

2011-11-29 Thread Noel Grandin
a long startup time is also something that would happen if a connection is holding a transaction open for a long time. the trace options might help you find this: http://www.h2database.com/html/features.html#trace_options zing wrote: > I'm also having trouble with long startup times - but the ea

Re: Database Stability Issues

2011-11-29 Thread zing
I'm also having trouble with long startup times - but the earlier comments about starting with MVCC off doesn't make work for me. According to the H2 documentation, MVCC is off by default, and I've never turned it on. How can I truncate the log without starting the database over from scratch? --

Re: Database Stability Issues

2011-11-26 Thread Noel Grandin
Also note that the mvcc option in h2 is still in beta, so there might still be bugs lurking in edge cases. On Sunday, 27 November 2011, Jason wrote: > I have found a temporary fix to the long start up time: simply connect > to the database with MVCC off. This action seems to clear the > transacti

Re: Database Stability Issues

2011-11-26 Thread Jason
I have found a temporary fix to the long start up time: simply connect to the database with MVCC off. This action seems to clear the transaction log after an hour or two. Any re-opening of the database after this initial connection will be nice and quick. In theory one could connect with MVCC on, b

Re: Database Stability Issues

2011-11-25 Thread Noel Grandin
Both of those problems sound like one of more of the connections are not calling commit() after inserting data into the database, holding the transaction open. Jason wrote: > I currently use H2 for a logging/monitoring application which runs > 24x7 and I am experiencing two issues: > > 1) The si

Database Stability Issues

2011-11-24 Thread Jason
I currently use H2 for a logging/monitoring application which runs 24x7 and I am experiencing two issues: 1) The size of the database constantly grows, and once the size hits around 250MB it refuses to accept new connections. If the database is shut down and re-opened the size of the database shri