Create your O’reilly book cover ;)
This is the cover of my first book :
Feel free to create your own on O'Reilly Maker
Feel free to create your own on O'Reilly Maker
lefred
I am MySQL Community Manager for EMEA & APAC. I joined the MySQL Community Team in May 2016. I have been an OpenSource and MySQL consultant for more than 15 years. My favorite topics are High Availability and Performance.
Sooner is better….
Since always, I believe that the best way of educating people to use and think opensource, this should happen early at school.
M$ knows that and since long time now they provide computers for schools, adult users of tomorrow are the children of today.
M$ now starts even earlier, look at this !
Bah... I've already a bunch of books with penguins for my daughter ;-)
Audacity and Fedora 8
I've tried today to use audacity for the first time since I'm using Fedora 8. What a disappointment: no sound !
I checked in preferences and none of these options were working :
I started then audacity using the following command line :
$ pasuspender audacity
I could consequently hear some output and many different sources in preferences :
I'm ready now to work on my favorites sounds...
[1] Audacity
[2] Fedora
I checked in preferences and none of these options were working :
I started then audacity using the following command line :
$ pasuspender audacity
I could consequently hear some output and many different sources in preferences :
I'm ready now to work on my favorites sounds...
[1] Audacity
[2] FedoraMySQL proxies
I've tested last night two proxies for MySQL : MySQL-Proxy and Dormando's Proxy for MySQL.
Both are working, but I still don't see really the advantage of using DPM over MySQL-Proxy, maybe I should make more tests but deploying MySQL-Proxy was easier as you define the backends as arguments in command line.
I plan to use a MySQL proxy in production as load-balancer in combination with replication and redirect all DML queries to the master.
Does one of you already use one of those two projects in production, what's your feedback ?
You can also find more information on DLM here.
It would be maybe nice to have a kind of buffer if for any reasons the backends servers are not responding ?
Nagios JBoss Check
As I had to monitor some JBoss servers and as there are some memory leaks in the program, the monitoring in Nagios of the Garbage Collector is very important. I've found some jmx script on JBoss wiki, but I was not happy with it. So I rewrite it to use twiddle.sh with the attributes I needed.
I had also to modify twiddle.sh to remove the logging capability (that was causing permission error) :
# diff twiddle.sh twiddleFred.sh
58c58
< JBOSS_CLASSPATH="$JBOSS_CLASSPATH:$JBOSS_HOME/client/log4j.jar"
---
> # removed to avoid log file JBOSS_CLASSPATH="$JBOSS_CLASSPATH:$JBOSS_HOME/client/log4j.jar"
Those are the nrpe test I implemented :
# check Perm Gen
command[check_jbosspem]=/usr/lib/nagios/plugins/check_jbosspem 127.0.0.1 4 jboss.system:type=ServerInfo listMemoryPools "Perm Gen" 70 90
# check Old Gen (Heap Memory)
command[check_jbossoldgen]=/usr/lib/nagios/plugins/check_jbosspem 127.0.0.1 4 jboss.system:type=ServerInfo listMemoryPools "Old Gen" 85 95
