ninode kernel value

Jose Mosquera — Tue, 22 Nov 2011 13:40:17 GMT

We have a VMGuest machine running on 11iv3.

# machinfo
CPU info:
12 Intel(R) Itanium(R) Processor 9350s (1.73 GHz, 6 MB)
2.39 GT/s QPI, CPU version E0

Memory: 28026 MB (27.37 GB)

Firmware info:
   Firmware revision: 04.30.00
   FP SWA driver revision: 1.18
   IPMI is supported on this system.
   BMC firmware revision: 4.1e

Platform info:
   Model:                  "ia64 hp server Integrity Virtual Machine"
   Machine ID number:      2ba29fb2-b854-11e0-8718-b499ba645408
   Machine serial number: VM01130004

OS info:
   Nodename: ---------
   Release:   HP-UX B.11.31
   Version:   U (unlimited-user license)
   Machine:   ia64
   ID Number: ---------
   vmunix _release_version:
@(#) $Revision: vmunix:    B.11.31_LR FLAVOR=perf

Reviewing the current kernel settings I've noticed an particular behavior on ninode value. At present machine have configured the 60096 value on ninode parameter:

#kctune -d ninode

Tunable Value Expression

Description

ninode 60096 60096

Maximum number of HFS file system open inodes that can be in memory.

By other way, when I run kcusage the following values are displayed:

#kcusage ninode

Tunable Usage / Setting

=============================================

ninode 2346 / 508439

As you can see the setting value is 579903 instead 60096!

So, when I execute sar -v the fllowing values are displayed:

# sar -v 1 10

HP-UX produ2 B.11.31 U ia64 11/22/11

14:33:04 text-sz ov proc-sz ov inod-sz ov file-sz ov

14:33:05 N/A N/A 916/7000 0 2730/508439 0 16508/2147483647 0

14:33:06 N/A N/A 916/7000 0 2729/508439 0 16506/2147483647 0

14:33:07 N/A N/A 916/7000 0 2729/508439 0 16506/2147483647 0

14:33:08 N/A N/A 916/7000 0 2729/508439 0 16507/2147483647 0

14:33:09 N/A N/A 916/7000 0 2729/508439 0 16507/2147483647 0

14:33:10 N/A N/A 915/7000 0 2729/508439 0 16500/2147483647 0

14:33:11 N/A N/A 915/7000 0 2729/508439 0 16500/2147483647 0

14:33:12 N/A N/A 915/7000 0 2729/508439 0 16500/2147483647 0

14:33:13 N/A N/A 915/7000 0 2729/508439 0 16500/2147483647 0

14:33:14 N/A N/A 915/7000 0 2729/508439 0 16499/2147483647 0

At this point the inod-sz is the same that kcusage value (508.439). I'm really confused by this situation. How I can controll the real value of ninode at kctune session?

Also I can see a highest value of file-sz (2.147.483.647) How I can set a discrete value?

We are trying to get free memory. Please find attached a file with kctune dump.

Thanks in advance

Re: ninode kernel value

Bill Hassell — Wed, 23 Nov 2011 22:34:29 GMT

ninode has been historically messed up as a setting sine before version 10. Always override ninode with a fixed value of 4096 or 8192. The formula is worthless and creates a massively large table in the kernel that will never be used.

topic ninode kernel value in Operating System - HP-UX

ninode kernel value

Re: ninode kernel value