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: Before: After restart network:
What can it be?
How can i solve this strange behavior?
Hello, everyone:
i encounter a problem these days , pls help me ,thanks in advance.
my env:
machine: ES40 A ES40 B
os: true64 Unix 4.0f
note: src.tar 8M network card speed 100M
my problem:
... (3 Replies)
Hi,
I am trying to send oracle archives over WAN and it is taking hell a lot of time. To reduce the time, I tried to gzip the files and send over to the other side. That seems to reduce the time. Does anybody have experienced this kind of problem and any possible ways to reduce the time.
... (1 Reply)
At work, I'm in a Solaris environment working with csh, and $PATH is populated with anywhere between 10 and 20 entries.
Last week, every command I issued (even "ls") took several seconds, if not an entire minute, to run. Once I moved "/home/sybase/bin" to the end of $PATH, certain commands... (2 Replies)
hey guys,
We have two Sun x2100 servers running RHEL5 in a test environment. Both servers are fresh OS installs and hooked up to the same network switch.
When ssh'ing to one server, there is a significant delay, while ssh'ing to the other server, the connection is almost instant. We are... (2 Replies)
Hi All,
Please let me know the command to restart the network interface and enable it on boot in AIX, similar to /etc/init.d/network restart in Redhat.
Thanks,
Sunil.K
please watch out to post in the right subforum! (9 Replies)
Hi Guys,
I've inherited a mess of an infrastructure in my new job, there hasn't been a sys admin in post for about a year, so things are falling apart. The first thing to break after I started was the printer server. I have it working again, and people can print, however it's very slow, slower... (0 Replies)
I have identical M5000 machines that are needing to transfer very large amounts of data between them. These are fully loaded machines, and I've already checked IO, memory usage, etc... I get poor network performance even when the machines are idle or copying via loopback. The 10 GB NICs are... (7 Replies)
Hello everyone,
I've been a life long Unix/Linux user but I'll be the first to admit I have little specific AIX knowledge at this point and I've inherited these systems for better or worse so please forgive if I ask something in the wrong context. And yes, I've searched google for 3 days now :)... (3 Replies)
Hello,
I would like to do follow steps.
Set a static IP-Adress on eth0 (For Testing)
Set DHCP on eth0
All steps should be done without a single reboot.
/etc/network/interfaces
iface eth0 inet static
address 192.0.2.7/24
gateway 192.0.2.254How do i perform... (3 Replies)
Discussion started by: int3g3r
3 Replies
LEARN ABOUT ULTRIX
timed
timed(8) System Manager's Manual timed(8)Name
timed - time server daemon
Syntax
/usr/etc/timed [ -i | -n network ][ -E ][ -M ][ -t ]
Description
The daemon synchronizes a host's time with the time of other machines in a local area network running It is normally invoked at boot time
from the file.
Servers running slow down the clocks of some machines and speed up the clocks of others to bring them all to the average network time. The
average network time is computed from measurements of clock differences with the Internet Communication Message Protocol (ICMP) timestamp
request message.
The service provided by is based on a master-slave scheme. When is started on a machine, it asks the master for the network time and sets
the host's clock to that time. After that, it accepts synchronization messages periodically sent by the master and calls the or routine to
perform any corrections on the host's clock.
It also communicates with the command to set the date globally, and with the control program, If the machine running the master crashes,
then the slaves elect a new master from among slaves running with the flag set. The flag provides time synchronization on any attached
networks where no current master server is detected. Such a server propagates the time computed by the top-level master. At least one
daemon on each network must run with the option set to allow it to become a master.
Options-E Overrides the input of slaves. Use the flag in conjunction with the flag. It specifies that a master should not average the times
of the slaves to calculate the network time but should distribute the time of its local host as the network time. This flag allows
a master to distribute time to a network while the network time is controlled by an outside agent such as the Network Time Protocol.
[-i | -n] network
-i Specifies a network to ignore. Each network that appears as an argument to the flag is added to the list of networks that
will ignore. If the flag is used, accesses all networks to which the host is connected except for those networks specified
as arguments to the flag.
-n Specifies a network to use. When the is started, it gathers information about all the network devices connected to the local
host. If neither the flag nor the flag is used, tries to access all the network devices connected to the local host. The
network argument to the flag is the name of a network that should access.
If the switch is used, only those networks specified by the flag are accessed.
Do not use the and flags together.
-M Allows a slave time server to become a master time server if the master server crashes. A system running the daemon without the
flag set remains a slave. The daemon checks for a master time server on each network to which it is connected. It requests syn-
chronization service from the first master server it locates.
-t Enables to trace the messages it receives in the file Tracing can be enabled or disabled with the program.
Restrictions
Any system running with the and options set is eligible to become the master, and distribute its local time to all systems running on its
network. Run the Network Time Protocol daemon, instead of to prevent this behavior.
Files
Invokes the daemon each time the system boots
Tracing file for
Log file for master
See Alsodate(1), adjtime(2), gettimeofday(2), networks(5), ntpd(8), timedc(8)
Introduction to Networking and Distributed System Services
timed(8)