High redo, log.xml and alert log generation with streams

Hi,
We have a setup where streams and messaging gateway is implemented on Oracle 11.1.0.7 to replicated the changes.
Until recently there was no issue with the setup but for last few days there is an excessive amount of redo and log.xml and alert log generation, which takes up about 50gb for archive log and 20 gb for the rest of the files.
For now we have disabled the streams.
Please suggest the possible reasons for this issue.
Regards,
Ankit

Obviously, as no one here has access to the two files with error messages, log.xml and alert log, the resolution starts with looking into those files
and you should have posted this question only after doing this.
Now no help is possible.
Sybrand Bakker
Senior Oracle DBA

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