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Full Discussion: Network becomes slow and return fast only after restart network
Operating Systems Linux Red Hat Network becomes slow and return fast only after restart network Post 302895303 by moshesa on Monday 31st of March 2014 05:59:38 AM
Old 03-31-2014
Network becomes slow and return fast only after restart network
Hi,
I have 2 machines in production environment:
1. redhat machine for application
2. DB machine (oracle)

The application doing a lot of small read&writes from and to the DB machine.

The problem is that after some few hours the network from the application to the DB becomes very slow and it returns to the normal only after:
Code:
service network restart

Before:
Code:
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=1 ttl=63 time=7.81 ms
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=2 ttl=63 time=5.88 ms
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=3 ttl=63 time=7.81 ms

After restart network:
Code:
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=84 ttl=63 time=0.135 ms
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=85 ttl=63 time=0.171 ms
64 bytes from hostname.domain (xxx.xxx.xxx.xxx): icmp_seq=86 ttl=63 time=0.153 ms

What can it be?
How can i solve this strange behavior?

Thanks.
 

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LEARN ABOUT DEBIAN

amttool

amttool(1)						      General Commands Manual							amttool(1)

NAME

       amttool - remotely control Intel AMT managed machines.

SYNOPSIS

       amttool host [ command ] [ arg(s) ]

DESCRIPTION

       amttool is a perl script which speaks SOAP to Intel AMT managed machines.  It can query informations about the machine in question and also
       send some commands for basic remote control.

       host is the hostname or IP address of the machine amttool should control.  command is an optional command.

       You must set fill AMT_PASSWORD environment variable with the AMT password.

       For more inforamtions on Intel AMT check amt-howto(7).

COMMANDS

       info   gather information (default).

       reset [ special ]
	      reset machine, with optional special command (see section below).

       powerup [ special ]
	      turn on machine.

       powerdown
	      turn off machine.

       powercycle [ special ]
	      powercycle machine.

       netinfo
	      print network configuration (requires AMT 2.5+).

       netconf if link [ ip mask gw [ dns1 [ dns2 ]]]
	      configure network interface (requires AMT 2.5+).	if is the interface handle, link the link policy.  If in doubt just feed  in  what
	      the  netinfo  command  prints.  ip is the IPv4 address, mask the netmask, gw the default gateway, dns1 and dns2 are the DNS Servers.
	      If no IP configuration is specified the tool tries to configure the machine in shared mac address mode with dhcp, otherwise in sepa-
	      rate mac address mode with static IP address.  Default for dns1 is the gateway address, for dns2 it is 0.0.0.0.

SPECIAL COMMANDS

       Special commands can optionally be specified for reset, powerup and powercycle.	They change the default boot behavior of the machine.

       bios   Asks for the BIOS boot messages being redirected to serial-over-lan.

       pxe    Network boot via PXE.

       hd     Boot from local disk.

       hdsafe Boot from local disk (safe mode).

       cd     Boot from CD/DVD.

       diag   Boot in diagnostics mode.

ENVIRONMENT

       AMT_PASSWORD
	      AMT password.

       AMT_DEBUG
	      Enable debug output.

SEE ALSO

       amtterm(1), gamt(1), amt-howto(7)

AUTHOR

       (c) 2007 Gerd Hoffmann <kraxel@redhat.com>

							     (c) 2007,08 Gerd Hoffmann							amttool(1)
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