fork and EXEC system calls are taking long time to load

[T Jose]

Hi,

my application team is complaing the the fork and exec system calls are taking long time to load. so that start up of their application is taking more time to load.

Hardware- Integrity BL860 i4

OS HP-UX 11i v3- release March-2013

looking for some hints to resolve the issue.

Regards,

 T Jos

[Dennis Handly]

How big is your application?  Where are the executables and shlibs?  Local disks or remote over NFS?

Do both take a long time or just exec?

[T Jose]

Hi, 

Our application is a trading software, no so heavy. Executable and shlibs are on a filessystem, LUNs are allocated from 3PAR over SAN. Application team complains both fork and exec are slow, that make their application to load slow.

Jos

[Dennis Handly]

>Executable and shlibs are on a filesystem, LUNs are allocated from 3PAR over SAN.

What happens if you copy them to a local filesystem?

>Application team complains both fork and exec are slow, that make their application to load slow.

How often is this loaded?  What process is doing the fork?  How many shlibs are used?

What does "swapinfo -tam" show during this time?