I have a script (Strawberry Perl) that reads certain records from a remote database server and stores results in a local mysql databasae after some processing. The script is invoked by double-clicking a batch file (like "perl mytask.pl")

Everything works as expected when run from the command prompt. Performance is fine with around 700 records per second.

Running the same batch as a scheduled script on the machine (virtualized Windows Server 2008 R2 on VMware ESX, Resources plentiful) slows the retrieval of data down to about 10 records per second).

Further processing of data (only locally now) works fine as before. Both CPU load and network load remain very low (close to idle) when the task runs as scheduled. Running the task interactive consumes ~50 % of CPU which seems plausible.

Any hint why running as scheduled has such a terrible effect on performance?

Greetings from Wiesbaden, Germany - Tabla

In reply to Script slow only when run as scheduled tasks on Windows Server by Tabla

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