Reboot Schedule

Mon, Feb 21st, 2005 - 6:00PM EST / 11:00PM UTC
Host 1

Reboot Details

Host1 has been dog-slow since the host kernel upgrade. I'm surprised no one has complained. Host1 needs a kernel with only highmem compiled in, not highmem4 or 64. This will be a quick reboot to get things back in order.

-Chris

I found out my server is VERY SLOW as reported by alexa.com. I thought my website is pretty heavy to load...

Thanks Caker; I thought I had just had bad luck as far as contention. I was getting a little suspicious the longer and longer my woody->sarge upgrade was taking today...

Host1 has been rebooted. Linodes are starting up.

Performance looks much better.

Thanks!
-Chris

does host31 have the same problem ?

you can check the slowness of mysql on my php site : http://diabeteplongee.com/phpBB2/
or
http://underwaterpics.org/

but a "normal" site works fine and fast

http://diabeteplongee.com/reglementation.html

Alex

I'm on host31 and I haven't noticed any problems. But I don't run mysql so I'm not sure if that is a relevent data point.

Mine has become so slow, it's almost unusable


eg :


top - 12:40:37 up 22:27, 3 users, load average: 10.29, 5.42, 4.13
Tasks: 89 total, 1 running, 88 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2% user, 0.2% system, 0.0% nice, 99.5% idle
Mem: 59356k total, 58308k used, 1048k free, 1872k buffers
Swap: 263160k total, 91888k used, 171272k free, 9180k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7329 root 15 0 5916 5016 3004 D 0.2 8.5 0:00.10 miniserv.pl
6835 root 17 0 732 680 680 R 0.2 1.1 0:16.60 top
7332 root 12 0 1356 1356 1104 S 1.0 2.3 0:00.04 couriertls
6625 mysql 10 0 5244 2708 2644 S 0.7 4.6 0:37.57 mysqld
7329 root 11 0 5664 4732 2972 D 0.7 8.0 0:00.06 miniserv.pl
7334 root 14 0 396 396 336 R 0.3 0.7 0:00.01 pop3login
1 root 8 0 112 80 80 S 0.0 0.1 0:00.14 init


does this come from the host, or from my linode setup ?

Alex

Sounds like you might be I/O limited... What's the output of

cat /proc/io_status

?

i've been following that, and usually they are closer to the max (400 000)

with this kind of output
io_count=2451567 io_rate=130 io_tokens=399976 token_refill=512 token_max=400000

now i'm trying to upgrade mysql, to see if it changes something, but during the emerge after some time it goes down

io_count=4060876 io_rate=527 io_tokens=139 token_refill=512 token_max=400000

my server isn't doing anything else and the load on my websites is very low,

Well, first, if your trying to emerge anything while still running all of the same stuff you were running when you printed out these stats, your in for a lot of trouble. You're using almost double the amount of swap as you are ram already putting your Linode in a stressful position if any of your services were to be hit hard, which it looks like is already the case with those load numbers. You either need to upgrade your Linode, or shut down any unused services and optimize the remaining since you only have 64MB ram to work with. You can make swap as big as you want, but it won't help. A LAMP setup is possible on a Linode 64, but you really need to watch what your doing closely. Also, since your running on Gentoo, if you need to do upgrades, you should temporarily shut down your services like Apache and MySQL while your using emerge.

BTW, I'm also on host31, and have actually seen an improvement in performance since the last kernel upgrades.

would an upgrade to linode 96 make a noticeable change in my case ?
the 128 version is a bit expensive for me right now

dear caker,

please re-check our HOST1, it seems having a problem. My apache httpd always down. It tooks so pretty slow to resart it.

After you have upragraded the HOST1, the httpd goes down more frequently than before.

awanglara

Mine's slow too, but I think it's only because I'm in the punitive I/O mode... I filled out a support ticket the other day, but haven't heard anything.