Wednesday, October 16, 2013

How to Take Crash Dumps on HP UNIX Machines?

www.unixbabuforum.inCan anyone guide, me how to take crash dump on hp unix 11.23?


www.unixbabuforum.inif you consider Itanium Processor: 

There is a new feature called compressed dumps available as of HP-UX Itanium release UX 11i v2 (i.e. UX 11.23). 
The data is compressed (using LZO algorithm) before being written out to the dump device. When the system crashes, the dump subsystem assigns one processor to perform the writes to the dump device(s). It assigns another four processors to perform compression. 
The dump compression features is targeted for large memory systems. Following requirements must be met: 
Systems: Superdome, Keystone, Matterhorn and Prelude 
OS: Itanium: UX 11i v2 (11.23) 
Configuration: at least 2GB RAM, at least 5 processors. 
And you can find more to configure / analysis / obtain crash - info from doc.hp.com

www.unixbabuforum.inIf you want to force a crash dump, log into the hardware console. Depending on the chipset and firmware level the the exact commands may differ slightly. You first go to the command menu (CM) and than issue a transfer of control to the dump program (TC). If you are running cell base hardware you will be prompted to the select the partition number. Be sure your primary dump/swap device is large enough to hold a a dump of your server's memory size. Also make sure /var/adm/crash is large enough to hold the crash file as it will be copied from the dump/swap file to this location (default location) upon reboot.

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