performance problem dev_io slowed

Hi all,

I am using MAXDB on a ERP system. This worked fine but a few days ago the access to the files went bad.

The answer from my colleagues is "nobody did nothing" so what could influence the read and write time to the database files?

Read time is above 150 ms for all files. Which files could I check on Linux to figure out the problem?

Thanks.

Best regards

Christian