Response time of AL11 files. How to reduce?

The time for INBOUND Directory of transaction AL11 has increase in time considerably in the last month and it is getting worse every month.
At this moment takes around 15 minutes for check if the interfaces has reached the system.
Could you please provide solution
Regards
Helpful answeres are surely rewarded.

AL11 transaction reads directory data from the file system. Generally it is slower when the directory being read has a lot of entries. These entries may be files or sub-directories. If this is the cause of your problem, have Basis move older files to a diffferent directory - eg "HISTORY_INBOUND".
If slowness not caused by this, then have Basis investigate if there is a file system issue.
AL11 program is RSWATCH0 - you could set some breakpoints and see which part is taking all the time.
Andrew

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