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bio website aliulis.com
location Vilnius, Lithuania
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visits member for 5 years, 4 months
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I ♥ Linux


Aug
6
comment What is the most proper way of wiring RJ45 for Cat6/LAN?
en.wikipedia.org/wiki/Category_6_cable
Jul
7
comment How to automate deletion of messages in the queue (selected by a keyword present in the corp email message)
serverfault.com/questions/534928/…
Jul
4
comment High volume low overhead requests
Then choose the one language, that you know best. Anyway your backend (database) will be biggest contention point, when scaling, not your programming language;)
Jul
3
comment What is the Ideal value for Worker Processes in Nginx Config?
Probably not. Only case, that you will want that some day nginx could use all of your cpu resources.
Apr
8
comment memory maxed out, but top not showing processes using this memory
That means: can not help without /proc/slabinfo :)
Apr
7
comment memory maxed out, but top not showing processes using this memory
Its quite low. But without /proc/slabinfo have no idea, what for slab is using its cache.
Apr
7
comment memory maxed out, but top not showing processes using this memory
df -i - will show number of inodes (file and folder metadata structures) used.
Apr
7
comment memory maxed out, but top not showing processes using this memory
You can increase sysctl parameter vm.vfs_cache_pressure over 100 to increase slab cache recovery, but that may introduce a big performance hit.
Apr
7
comment memory maxed out, but top not showing processes using this memory
Thats probably kernel or virtualization related. This makes debuging harder, but still how much files do you have? For example my server with about 500000 files uses about 300MB of slab for ext4_inode_cache and dentry cache.
Apr
7
comment memory maxed out, but top not showing processes using this memory
This will sort by cache size: slabtop -o -s c
Apr
7
comment memory maxed out, but top not showing processes using this memory
So post at least slabtop output and df -i.
Apr
7
comment memory maxed out, but top not showing processes using this memory
First check slabtop where this ram is used. Slab has a lot different usage and the example was only one, that I have personally encountered. And it is mainly connected not with reads and writes, but with number of files in disks.
Jan
30
comment How to duplicate TCP traffic to one or multiple remote servers for benchmarking purposes?
@Sise: you could try writing your own http proxy, that passes traffic to two servers. It should be pretty easy to do with python Twisted framework twistedmatrix.com.
Jan
24
comment Advice on web server performance troubleshooting is needed
What is your database doing at that time? Is those statistics from a time when server gets slow?
Dec
16
comment Puppet eval variable only once
You can not use it as parameter, because parameter needs to be filled every time a puppet runs. Unless you save your passwords in recoverable format, what is not a very good advice :)
Dec
13
comment Cant access ssh on first attempt
Paste the log with -v flag.
Dec
12
comment Nginx proxy does not pass url in a controller/action structure to Apache2
You probably need to add all location part of example config: framework.zend.com/manual/1.12/en/…
Dec
12
comment Nginx proxy does not pass url in a controller/action structure to Apache2
That probably will need some rewrite in apache.
Dec
10
comment Apache2 Debian server falls. Out of memory
When killed mysql was taking: anon-rss:78328kB... So clearly not all ram in server.
Dec
10
comment Apache2 Debian server falls. Out of memory
It is in your provided log:) Mysql rss 19582 pages of memory and sum of all apache rss memory pages are 166280. Even if big part of it overlaps because of shared libraries, it anyway eats much more ram then mysql.