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Top Forums UNIX for Advanced & Expert Users Nearly Random, Uncorrelated Server Load Average Spikes Post 303044138 by Neo on Saturday 15th of February 2020 02:28:08 AM
Old 02-15-2020
Next:

I have some old "cyberspace situational awareness" PHP code I used for a visualization project a few years ago, which captures and stores details information on web session activity; this code has proven handy identifying rouge bots in the past.

So, I have modified that code to capture and store detailed session information, including the number of hits per IP address, the user agent string, country code, etc. when the 1 minute load average is above 20 and less than 50.

Code:
$theload = getLoadAvg();
if (floatval($theload) > 20.0 && floatval($theload) < 50.0) 
{
  /// the old CSA code to parse web session activity and store the results in the DB
}

So, let's see what happens the next time we get a spike... this should be interesting.


Code:
mysql> describe neo_csa_session_manager;
+--------------+------------------+------+-----+---------+----------------+
| Field        | Type             | Null | Key | Default | Extra          |
+--------------+------------------+------+-----+---------+----------------+
| id           | int(11) unsigned | NO   | PRI | NULL    | auto_increment |
| user_id      | int(11)          | NO   | MUL | 0       |                |
| session_id   | varchar(255)     | NO   |     | NULL    |                |
| url          | text             | NO   |     | NULL    |                |
| ip_address   | varchar(45)      | NO   | MUL | NULL    |                |
| user_agent   | varchar(255)     | NO   |     | NULL    |                |
| bot_flag     | tinyint(1)       | NO   |     | 0       |                |
| robot_txt    | mediumint(6)     | NO   |     | 0       |                |
| sitemap      | mediumint(6)     | NO   |     | 0       |                |
| riskscore    | int(11)          | NO   |     | 0       |                |
| country_iso2 | varchar(2)       | NO   |     | UN      |                |
| country      | varchar(50)      | NO   |     | UNKNOWN |                |
| hitcount     | int(10) unsigned | NO   |     | 1       |                |
| firstseen    | bigint(11)       | NO   |     | NULL    |                |
| unixtime     | bigint(11)       | YES  |     | NULL    |                |
| longitude    | float            | NO   |     | 0       |                |
| latitude     | float            | NO   |     | 0       |                |
+--------------+------------------+------+-----+---------+----------------+
17 rows in set (0.00 sec)

This User Gave Thanks to Neo For This Post:
 

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DBIx::Class::DateTime::Epoch(3pm)			User Contributed Perl Documentation			 DBIx::Class::DateTime::Epoch(3pm)

NAME
DBIx::Class::DateTime::Epoch - Automatic inflation/deflation of epoch-based columns to/from DateTime objects SYNOPSIS
package MySchema::Foo; use base qw( DBIx::Class ); __PACKAGE__->load_components( qw( DateTime::Epoch TimeStamp Core ) ); __PACKAGE__->add_columns( name => { data_type => 'varchar', size => 10, }, bar => { # epoch stored as an int data_type => 'bigint', inflate_datetime => 1, }, baz => { # epoch stored as a string data_type => 'varchar', size => 50, inflate_datetime => 'epoch', }, # working in conjunction with DBIx::Class::TimeStamp creation_time => { data_type => 'bigint', inflate_datetime => 1, set_on_create => 1, }, modification_time => { data_type => 'bigint', inflate_datetime => 1, set_on_create => 1, set_on_update => 1, } ); DATETIME
::FORMAT DEPENDENCY There have been no assumptions made as to what RDBMS you will be using. As per the note in the DBIx::Class::InflateColumn::DateTime documentation, you will need to install the DateTime::Format::* module that matches your RDBMS of choice. DESCRIPTION
This module automatically inflates/deflates DateTime objects from/to epoch values for the specified columns. This module is essentially an extension to DBIx::Class::InflateColumn::DateTime so all of the settings, including "locale" and "timezone", are also valid. A column will be recognized as an epoch time given one of the following scenarios: o "data_type" is an "int" of some sort and "inflate_datetime" is also set to a true value o "data_type" is some other value (e.g. "varchar") and "inflate_datetime" is explicitly set to "epoch". DBIx::Class::TimeStamp can also be used in conjunction with this module to support epoch-based columns that are automatically set on creation of a row and updated subsequent modifications. METHODS
add_columns( ) Provides backwards compatibility with the older DateTime::Epoch API. _inflate_to_datetime( ) Overrides column inflation to use "Datetime->from_epoch". _deflate_from_datetime( ) Overrides column deflation to call "epoch()" on the column value. SEE ALSO
o DBIx::Class o DBIx::Class::TimeStamp o DateTime AUTHORS
Brian Cassidy <bricas@cpan.org> Adam Paynter <adapay@cpan.org> COPYRIGHT AND LICENSE
Copyright 2006-2012 by Brian Cassidy This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.14.2 2012-02-01 DBIx::Class::DateTime::Epoch(3pm)
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