Reputation
3,801
Top tag
Next privilege 5,000 Rep.
Approve tag wiki edits
Badges
1 11 25
Impact
~340k people reached

Jul
17
comment NFS directory not working
Does mounting as (vfstype) nfs4 make a difference?
Jul
1
comment MySQL is running VERY slow on CentOS 6x (not 5x)
barrier=0 instead of defaults
Jul
1
comment MySQL is running VERY slow on CentOS 6x (not 5x)
The default datadir is /var/lib/mysql and given your laptop file info the datadir is on ext4. Edit /etc/fstab to include barrier=0 as a mount option and reboot.
Jun
26
comment How important is patch management?
Not to be pedantic, but I think you mean "prying eyes".
Jun
22
comment Webserver load test
Canonical question: serverfault.com/questions/350454/…
Jun
20
comment Unable to setup HTTP Server so that external clients can access
What are the firewall rules?
Jun
20
comment LAMP -> CPU usage of Apache processes too high
Are you using mod_security?
Jun
12
comment Performance drop after hours of runtime - how to detecting bottleneck
Collect metrics with Cacti or Munin for a start.
Apr
8
comment mysql client slow login strace
If you do a SHOW PROCESSLIST while the client is connecting do you have some relatively long running thread in "checking permissions" state? How many users are in the mysql.user table?
Feb
27
comment Does the OS (Ubuntu LTS vs CentOS) has a significant impact on the performance of a MySQL Server
I think it will be difficult for anyone to answer this without doing an apples-to-apples test. You should do your own testing where you use the same version of MySQL with identical configuration settings not only of MySQL (my.cnf) but of the filesystem, etc. I would be very surprised if after all that effort to standardize if there was a significant performance difference.
Feb
18
comment Mysql using the whole CPU, can't explain why
Also see if you have some long running queries. e.g. mysqladmin processlist
Feb
18
comment Mysql using the whole CPU, can't explain why
What OS / version? I suspect those are threads of a single MYSQL process.
Feb
18
comment CentOS system emails fail
Dovecot is not a SMTP server. If you don't have experience setting up Sendmail or Postfix and email origin authentication measures (e.g. DKIM signing your email) I'd recommend that you checkout PostMarkapp.com
Feb
18
comment CentOS system emails fail
What have you done to configure the SMTP server on your machine? What have you done to provide email origin authentication?
Feb
12
comment Idea for taking down half of the servers vs rolling restart?
Out of curiosity what are doing at the DB tier to achieve your zero downtime deployment?
Feb
11
comment Increasing tmp_table_size and max_heap_table_size to no avail
If you can't use an index or improve the query design you are probably better off getting more memory for the server and putting MySQL's tmpdir on a RAM disk. Temporary tables on disk are a performance killer.
Feb
7
comment Apache bottle neck
Can you take nginx out of the picture first?
Feb
7
comment Apache bottle neck
I suggest you try mod_php as Tomestzky suggested.
Feb
7
comment Apache bottle neck
Are there corresponding entries in /var/log/messages? What version of nginx are you using? nginx -v
Feb
6
comment Apache bottle neck
Re: nginx, check its nginx_error.log file.