Category Archives: Databases

DB2: (SQL Error: -30090) caused by XA access to a nickname to a federated database

By | February 8, 2017
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In a setup having an enterprise application depending on a database instance where some tables are defined as nicknames to tables from a federated database, it can happen to get this very cryptic DB2 error. [12/10/15 18:06:54:895 IST] 00000073 SqlExceptionH Z org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions SQL Error: -4229, SQLState: null [12/10/15 18:06:54:903 IST] 00000073 SqlExceptionH Z org.hibernate.engine.jdbc.spi.SqlExceptionHelper… Read More »

DB2: Finding and adding indices

By | February 8, 2017
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DB2 has a very powerful tool (db2advice) to determine necessary indices for your DB2 database. Having a good index can have a very big boost in performance in any application. If working with high throughput systems it is crucial to have the right index. Note that my databse user is db2inst1 and database name MMS.… Read More »

DB2 Sqlcode: -964, Sqlstate: 57011 (transaction log for the database is full)

By | February 8, 2017
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I got this error while doing some performance tests on a high volume system using DB2. This is the usual unintuitive error that IBM likes to give to the users 🙂 IN plain English this means that “The transaction log for the database is full.” This appears when you have to execute UPDATE or INSERT… Read More »