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From mike matrigali <mikema...@gmail.com>
Subject Re: Issue with large delete in derby
Date Fri, 31 Jan 2014 05:05:27 GMT
On 1/29/2014 10:46 PM, Amitava Kundu1 wrote:
>
> Hi,
> We are using embedded derby 10.5.1.1 in our product, This derby database is
> used as regular RDBMS where lot of insert, delete and select happens, There
> are business entities each of its occurrence could be of size 10 GB and
> upward e.g. a huge log file data.
> In our application, we use cascade delete and also has referential
> integrity constraints ON.
>
> This application runs on 64 bit Linux with 8 GB RAM allocated to JVM.
> Similar time is observed in our development Windows box.
>
>   It takes more than 3 hour to delete those entities. During this time all
> the relevant tables stay locked and no other operation is feasible.
>
> We'd like know what could be different options/ strategy be adopted for:
>     Speeding up the delete process
>     Ability to other database activities in parallel
>
>
> Thanks
> 	Amitava Kundu
>
>
here is a link about diagnosing performance issues that may help:
http://wiki.apache.org/db-derby/PerformanceDiagnosisTips

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