A full DB2 database transaction log is a common problem, usually caused by insufficient log space or untimely log archiving. Here are the steps to solve it:

　　1. Check the log status

　　Use the following command to view the log usage:

　　db2 get db cfg for | grep -i log

　　Focus on the LOGPRIMARY, LOGSECOND, and LOGFILSIZ parameters.

　　2. Increase the size or number of primary log files

　　Increase the size of the primary log file:

　　db2 update db cfg for using LOGFILSIZ

　　Increase the number of primary log files:

　　db2 update db cfg for using LOGPRIMARY

　　3. Increase the number of auxiliary log files

　　If the primary log files are not enough, you can increase the number of auxiliary log files:

　　db2 update db cfg for using LOGSECOND

　　4. Archive logs

　　If the logs are not archived in time, you can enable log archiving:

　　db2 update db cfg for using LOGARCHMETH1 DISK:

　　Then restart the database:

　　db2stop

　　db2start

　　5. Clean up old logs

　　Manually clean up old log files that are no longer needed to free up space.

　　6. Check for long-running transactions

　　Long-running transactions may take up a lot of log space. Use the following command to find and terminate them:

　　db2 list applications show detail

　　After finding the long-running transaction, terminate it with the following command:

　　db2 "force application ()"

　　7. Increase the log file system space

　　If the log file system space is insufficient, increase the disk space or move the log file to a larger file system.

　　8. Monitoring and optimization

　　Regularly monitor log usage, optimize transaction processing, and avoid long-running transactions.

　　Summary: By increasing the size or number of log files, enabling log archiving, cleaning up old logs, terminating long-running transactions, and increasing file system space, the problem of full DB2 database transaction logs can be effectively solved.