I have confirmed 100% the source of the these spikes were very aggressive, rogue, unidentified bots originating on Chinese networks. After blocking the resident networks of these bots, all spikes have stopped, completely.
This is a "huge success story", going from unknown, uncorrelated performance hits / spikes due to nearly random spikes in performance to cause identification and total resolution. As you can see from the graph over the last 24 hours, there have been zero spikes.
I will keep the same MQTT and Node-RED instrumentation in place (which I am very pleased with) and will also keep all "spike trapping" instrumentation and DB logging in place, so if other spikes appear, which I am fairly confident more of these "pesky" bots will appear sooner or later, I will trap them, identify the source and block their resident networks.
Success!
MQTT and Node-RED did not "solve the problem". MQTT and Node-RED provided a very powerful and flexible way for me to quickly instrument custom sensors and logging, which helped me identify the problem.
I highly, recommend MQTT and Node-RED. These tools are free. Thank you very much MQTT and Node-RED developers!
we have an unix system which has
load average normally about 20.
but while i am running a particular unix batch which performs heavy
operations on filesystem and database average load
reduces to 15.
how can we explain this situation?
while running that batch idle cpu time is about %60-65... (0 Replies)
Hello all, I have a question about load averages.
I've read the man pages for the uptime and w command for two or three different flavors of Unix (Red Hat, Tru64, Solaris). All of them agree that in the output of the 2 aforementioned commands, you are given the load average for the box, but... (3 Replies)
Hello, Here is the output of top command. My understanding here is,
the load average 0.03 in last 1 min, 0.02 is in last 5 min, 0.00 is in last 15 min.
By seeing this load average, When can we say that, the system load averge is too high?
When can we say that, load average is medium/low??... (8 Replies)
Hi,
i have installed solaris 10 on t-5120 sparc enterprise.
I am little surprised to see load average of 2 or around on this OS.
when checked with ps command following process is using highest CPU. looks like it is running for long time and does not want to stop, but I do not know... (5 Replies)
Hello AlL,..
I want from experts to help me as my load average is increased and i dont know where is the problem !!
this is my top result :
root@a4s # top
top - 11:30:38 up 40 min, 1 user, load average: 3.06, 2.49, 4.66
Mem: 8168788k total, 2889596k used, 5279192k free, 47792k... (3 Replies)
Hi ,
I am using 48 CPU sunOS server at my work.
The application has facility to check the current load average before starting a new process to control the load.
Right now it is configured as 48. So it does mean that each CPU can take maximum one proces and no processe is waiting.
... (2 Replies)
Hi,
I am getting a high load average, around 7, once an hour. It last for about 4 minutes and makes things fairly unusable for this time.
How do I find out what is using this. Looking at top the only thing running at the time is md5sum.
I have looked at the crontab and there is nothing... (10 Replies)
Here we go....
Preface:
..... so in a galaxy far, far, far away from commercial, data sharing corporations.....
For this project, I used the ESP-WROOM-32 as an MQTT (publish / subscribe) client which receives Linux server "load averages" as messages published as MQTT pub/sub messages.... (6 Replies)
Discussion started by: Neo
6 Replies
LEARN ABOUT DEBIAN
mojo::ioloop::server
Mojo::IOLoop::Server(3pm) User Contributed Perl Documentation Mojo::IOLoop::Server(3pm)NAME
Mojo::IOLoop::Server - Non-blocking TCP server
SYNOPSIS
use Mojo::IOLoop::Server;
# Create listen socket
my $server = Mojo::IOLoop::Server->new;
$server->on(accept => sub {
my ($server, $handle) = @_;
...
});
$server->listen(port => 3000);
# Start and stop accepting connections
$server->start;
$server->stop;
DESCRIPTION
Mojo::IOLoop::Server accepts TCP connections for Mojo::IOLoop.
EVENTS
Mojo::IOLoop::Server can emit the following events.
"accept"
$server->on(accept => sub {
my ($server, $handle) = @_;
...
});
Emitted safely for each accepted connection.
ATTRIBUTES
Mojo::IOLoop::Server implements the following attributes.
"accepts"
my $accepts = $server->accepts;
$server = $server->accepts(10);
Number of connections to accept at once, defaults to 10.
"reactor"
my $reactor = $server->reactor;
$server = $server->reactor(Mojo::Reactor::Poll->new);
Low level event reactor, defaults to the "reactor" attribute value of the global Mojo::IOLoop singleton.
METHODS
Mojo::IOLoop::Server inherits all methods from Mojo::EventEmitter and implements the following new ones.
"listen"
$server->listen(port => 3000);
Create a new listen socket. Note that TLS support depends on IO::Socket::SSL and IPv6 support on IO::Socket::INET6.
These options are currently available:
"address"
Local address to listen on, defaults to all.
"backlog"
Maximum backlog size, defaults to "SOMAXCONN".
"port"
Port to listen on.
"tls"
Enable TLS.
"tls_ca"
Path to TLS certificate authority file.
"tls_cert"
Path to the TLS cert file, defaults to a built-in test certificate.
"tls_key"
Path to the TLS key file, defaults to a built-in test key.
"generate_port"
my $port = $server->generate_port;
Find a free TCP port, this is a utility function primarily used for tests.
"start"
$server->start;
Start accepting connections.
"stop"
$server->stop;
Stop accepting connections.
SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>.
perl v5.14.2 2012-09-05 Mojo::IOLoop::Server(3pm)