Although versions are not that important, just for the sake of completeness we were using CentOS 5.5, MySQL 5.5.8 Community RPMs, Net SNMP version 5.3.22 and OpenNMS Web Console 1.8.7.
CRIB is a CentRal Information Base for MySQL, a long time coming project since I worked on it on and off for a few weeks and now I decided it’s time to hand it over to the global MySQL community.
So, what is CRIB?
CRIB is a central database which collects information about all your MySQL instances which you set as clients. It is monitoring in a way, but not the typical number of connections, memory, index usage, table scans, cpu usage and such, but rather consists of a repository where, if you have tens, hundreds or even thousands of clients, you can see where a particular user was created, where a certain database name features or which tables does a database consists of. It also features a script which logs table sizes periodically (customizable) so you can graph disk usage over time and be able to forecast future disk space requirements[Read more...]
Revision 208 of mycheckpoint, a MySQL monitoring solution, has been released. New and updated in this revision:
One... *billion* emails!One *Billion* Emails
In email marketing there are senders of all shapes and sizes, from small businesses using self-serve ESPs to the largest web properties self-sending to massive user bases. While only a few senders will reach or exceed volumes of one billion messages per month, the tools and practices needed to achieve such a volume level are applicable to all senders who want to succeed in email marketing.Who Am I? [Read more...]
Revision 190 of mycheckpoint, a MySQL monitoring solution, has been released. New and updated in this revision:
Revision 170 of mycheckpoint, a MySQL monitoring solution, has been released. New and updated in this revision:
One role of a MySQL consultant is to review an existing production system. Sometimes you have sufficient time and access, and other times you don’t. If I am given a limited time here is a general list of things I look at.
Apache And MySQL Monitoring With Bijk On Debian Lenny
This tutorial describes how you can monitor your server with the tool Bijk. Bijk creates online 30 graphs about load, CPU, memory, traffic, Apache, NginX, PostreSQL and others with alerts. Bijk can be used on Debian, Ubuntu, CentOS, RedHat and Gentoo. In this article I will explain how to install Bijk on Debian.
I was trying to setup cacti on my ubuntu desktop to gather metrics from few new database servers we were planning to replace. Installed cacti using the following command
apt-get install cacti
Then the next step was to download and the install the cacti mysql templates from http://code.google.com/p/mysql-cacti-templates/. Thanks to Baron, was able to get this up and running fast using the templates. But had one problem though, while importing the mysql template “cacti_host_template_x_mysql_server_ht_0.8.6i-sver1.1.7.xml” cacti bombed with the below error
Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 41
Revision 132 of mycheckpoint has been released. New and updated in this revision:
Custom monitoring allows the user to supply with a query, the results of which will be monitored.
That is, mycheckpoint monitors the status variables, replication status, OS metrics. But it cannot by itself monitor one’s application. Which is why a user may supply with such query as:
SELECT COUNT(*) FROM shopping_cart WHERE is_pending=1
Such a query will tell an online store how many[Read more...]
One of the first special reports I wrote for 451 Group was an analysis of the open source systems management vendors on the scene — GroundWork, Hyperic, Zenoss, OpenNMS Group, Nagios Enterprises and some others. These named ones are those that made it and while there was some reckoning in the market and there have been changes, it is interesting to see these players still plugging away, pushing into new markets and powering open source for systems, network and application monitoring and management, including cloud computing environments.
When acquired by SpringSource a year ago, there was some question as to the real value of open source systems monitoring and management[Read more...]
Revision 118 of mycheckpoint has been released. New and updated in this revision:
With this new revision mycheckpoint turns into a monitoring solution for MySQL. One can now:
mycheckpoint is SQL oriented. As such, it allows for[Read more...]
Working on mycheckpoint, I have the intention of adding custom monitoring. That is, letting the user define things to monitor. I have my own thoughts, I would be grateful to get more input!
Monitoring for the number of SELECT statements per second, InnoDB locks, slave replication lag etc. is very important, and monitoring utilities provide with this information. But what does that tell the end user? Not much.
The experienced DBA may gain a lot. The user would be more interested in completely other kind of information. In between, some information is relevant to both.
Say we were managing an on-line store. We want to monitor the health of the database. But the health of the database is inseparable from the health of the application. I mean, having little to no disk usage is fine,[Read more...]
I’d like to note some differences in using charts of both kinds. And I think it makes a very big difference.
I’ll call any image-based chart by “static chart”. It’s just a static image. Example of such charts are those generated by Google Image Charts (they now also have new, interactive charts), or RRDtool. Show below is[Read more...]
Looking around on Google for a webpage test script returns a lot of results. Some of them are useful, some are not. In particular, for Python, the scripts on the first page of results are minimal and lacking a useful copy and paste / ready to go script that will answer the question “is my webpage available?”. So I decided to write a quick one that will give you the return code and email you as an alert if the page does not return with a 200 code (successful). You can find the script here. Update: the webserver was trying to execute the script as a .py file so I just changed it to .txt – for it to work you will want to change the .txt extension to a .py extension after you download it.
If you are familiar with Python scripting, this script could easily be modified to post to a form so that you can[Read more...]
mycheckpoint now monitors (on Linux only) three mount points:
It may well be the case that two of the above (or perhaps all three of them) share the same mount point. For example, if there isn’t any particular partition for “/tmp“, it is possible that the tmpdir (by default[Read more...]