Tuning A FreeBSD VPS For Network Performance
Jul 13, 2009
I have a VPS system on the west coast of the US, and access it from the east coast. Sometimes I can get 1Mbyte/sec downloads, and other times it is as bad a 250KB/sec.
I have done some pings, and have not seen any packet loss. I've experimented with sysctl and changed some parameters to hopefully help, but really haven't seen much of a difference.
Does anyone have a recommendation as to what I could do different to squeeze a little more speed out of the connection? The problem is that from both sides of the US, I see ping times (depending on different ISPs on the east coast) from 80ms-120ms.
Here is what I've tuned so far:
kern.ipc.nmbclusters=65535
net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.recvbuf_max=16777216
net.inet.tcp.sendspace=78840
net.inet.tcp.recvspace=78840
net.inet.tcp.mssdflt=1460
net.inet.tcp.slowstart_flightsize=52
net.inet.tcp.inflight.min=29200
net.inet.tcp.sendbuf_inc=8760
net.inet.tcp.recvbuf_inc=8760
net.inet.tcp.sendbuf_auto=1
net.inet.tcp.recvbuf_auto=1
net.inet.tcp.delayed_ack=1
net.inet.tcp.delacktime=150
net.inet.tcp.inflight.enable=1
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Mar 12, 2008
I need to get a couple of dedicated windows servers and am trying to decide between SoftLayer and a couple other providers.
So, how is SoftLayer for customer support, network performance/uptime, pricing, and just overall?
Any recommendations?
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Jun 7, 2009
Can anybody show me how to tune the prefork module I don't know where to begin.
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Apr 24, 2009
as part of a project I have lately been looking into various aspects of kernel tuning. Most notably lately tuning the TCP stack for more efficient memory usage/throughput.
Thought I would start this thread to mention some of the tools I'd found for doing testing and see what anyone else had to recommend.
So far my favorite of the bunch is nuttcp. Its easy to use and gives a very good idea of how much of your bandwidth you are able to utilize.
A few interesting web pages are as follows for anyone interested in the topic:
[url]- Tuning TCP for High Bandwidth Delay networks
[url]- TCP Tuning Cook book, some interesting information in there as well
[url]...formanceTuning - Performance Tuning TWiki. Has a list of useful tools, flags for existing tools and ways to monitor network performance from a system level, along with some suggestions of things to correct
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May 5, 2009
shared hosting env?
/etc/sysctl.conf:
vm.dirty_background_ratio = 20
vm.dirty_ratio = 60
blockdev --setra 16384 /dev/sda
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Apr 11, 2008
i have this couple of windows 2003 servers, colocated in data center, i need to improve download speeds to our customers who are at least 200ms away, the end user is not using download accelarator,
is there a way that any settings to be done on server so that per thread speed can be increased, this case the server and client both have the ability to make a connection at more than a megabit speed. i did some search but all the articles point to end user and not the server saying to increase tcp window size etc.. not sure if those articles relate to server side changes.
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Dec 19, 2008
I have Linux server with WHM/Cpanel with 2000 domains now my problem is.Mysql is using 90-100% CPU usage and 1500-2000 queries are running at a time so please guide me how can i optimize it and how can i tune mysql server so it doesn't go high.
I have configure my.cnf file as --->
max_allowed_packet = 4M
set-variable = max_connections=100
safe-show-database
query_cache_limit=1M
query_cache_size=128M
query_cache_type=1
key_buffer_size=256M
long_query_time = 3
table_cache=9092
how can i do this and any changes is require ?
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Apr 4, 2007
I've noticed I'm getting high numbers for Handler_read_rnd_next.
How can I dig deeper to find out which tables/queries are causing this?
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Jun 16, 2008
What have you found to be the best tuning sites for MySQL?
I'm getting into a bit of trouble. We have a weather site, and with all of the traffic, we're getting a little tapped out. When the loads hit between 134 and 160, the mail clients start to time out. Apache is still pretty fast, although it takes a little longer once you cross loads of 80, 5 second page loads, but when it hits between 130 and 160, I'm seeing 15-20 second page loads. DA is impossible above 80 but SSH is still very workable. Apache is tweaked to the max. I've kicked up some of the sizes in MySQL several weeks ago, and that did it them. However, we're taking on about 22,000 to 25,000 uniques an hour now. We normally can handle that no problem, but people are asking for maps a lot more now with the flooding and all. That requires a lot of MySQL lookups and the CPU creating a lot more maps. The maps I already cache for the duration, which is 15 minutes. The only horse I have left to whip is MySQL. After that, it will probably be a move to FreeBSD 7, but I'd like to throw in a few tweaks yet before we do that.
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Nov 22, 2007
Quote:
MySQL Version 4.1.22-standard i686
Uptime = 0 days 0 hrs 4 min 15 sec
Avg. qps = 17
Total Questions = 4479
Threads Connected = 1
Warning: Server has not been running for at least 48hrs.
It may not be safe to use these recommendations
To find out more information on how each of these
runtime variables effects performance visit:
[url]
SLOW QUERIES
Current long_query_time = 10 sec.
You have 1 out of 4491 that take longer than 10 sec. to complete
The slow query log is NOT enabled.
Your long_query_time may be too high, I typically set this under 5 sec.
WORKER THREADS
Current thread_cache_size = 128
Current threads_cached = 6
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine
MAX CONNECTIONS
Current max_connections = 2000
Current threads_connected = 1
Historic max_used_connections = 7
The number of used connections is 0% of the configured maximum.
You are using less than 10% of your configured max_connections.
Lowering max_connections could help to avoid an over-allocation of memory
See "MEMORY USAGE" section to make sure you are not over-allocating
MEMORY USAGE
Max Memory Ever Allocated : 96 M
Configured Max Per-thread Buffers : 10 G
Configured Max Global Buffers : 58 M
Configured Max Memory Limit : 10 G
Total System Memory : 3.95 G
Max memory limit exceeds 85% of total system memory
KEY BUFFER
Current MyISAM index space = 78 M
Current key_buffer_size = 16 M
Key cache miss rate is 1 : 735
Key buffer fill ratio = 8.00 %
Your key_buffer_size seems to be too high.
Perhaps you can use these resources elsewhere
QUERY CACHE
Query cache is enabled
Current query_cache_size = 32 M
Current query_cache_used = 4 M
Current query_cach_limit = 1 M
Current Query cache fill ratio = 14.83 %
Your query_cache_size seems to be too high.
Perhaps you can use these resources elsewhere
MySQL won't cache query results that are larger than query_cache_limit in size
SORT OPERATIONS
Current sort_buffer_size = 2 M
Current record/read_rnd_buffer_size = 256 K
Sort buffer seems to be fine
JOINS
Current join_buffer_size = 1.00 M
You have had 0 queries where a join could not use an index properly
Your joins seem to be using indexes properly
OPEN FILES LIMIT
Current open_files_limit = 10000 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine
TABLE CACHE
Current table_cache value = 1024 tables
You have a total of 721 tables
You have 93 open tables.
The table_cache value seems to be fine
TEMP TABLES
Current max_heap_table_size = 16 M
Current tmp_table_size = 32 M
Of 212 temp tables, 0% were created on disk
Effective in-memory tmp_table_size is limited to max_heap_table_size.
Created disk tmp tables ratio seems fine
TABLE SCANS
Current read_buffer_size = 1 M
Current table scan ratio = 17754 : 1
You have a high ratio of sequential access requests to SELECTs
You may benefit from raising read_buffer_size and/or improving your use of indexes.
TABLE LOCKING
Current Lock Wait ratio = 1 : 76
You may benefit from selective use of InnoDB.
If you have long running SELECT's against MyISAM tables and perform
frequent updates consider setting 'low_priority_updates=1'
how to make the changes in red? My server works good for awhile, but then gets REALLY REALLY slow.
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Jul 13, 2007
I am using dreamhost host 3 of my web sites and 1 blog. Dreamhost is great, offers alot space and bandwidth.
but I think they are oversellling their space, sometimes it gets really slow. (overselling ? ok, I dont really know, but sometimes its really slow, and most my asian readers said need to refresh to load the page. I am wondering if theres a way to check if they are overselling or not.)
I am thinking about buying vps, even tho, I still got 5 month left with dreamhost.
I found 2 vps companies are highly recommanded on this forum, JaguarPC and LiquidWeb.
theres already a post compared both companies in terms of price and service. I say I will pick JagarPc, cuz, its basic plan just 20 USD, and htey got promotion now, its even cheaper. and basic Liquidweb vps plan is 60 bucks.
I am wondering why Jagarpc is so cheap , are they overselling? how can we check if they are overselling.
I found a few posts saying how good jaguarPc is. and they are not overselling, but those members just signed up this month, and only have 1-3 posts. I cannot really trust those new members.
Can someone share their experience with JaguarPC? compare JaguarPc performance and liquidweb performance. antoher question is switch from dreamhost to JaguarPC basic vPS plan, will performance gets better?
last question: VPS account allows 3 IP, 3ip = 3 domains? if not, how many domains can I have?
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Oct 14, 2009
any experiences to report about purchasing used / refurb gear from either Network Liquidators (nweq.com) or Network Hardware (networkhardware.com)?
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Aug 14, 2008
whether if i will an increase in performance or security if I upgrade from 6.3 to 7.0?
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Jan 10, 2007
How do I check if SMP is on in FreeBSD? And if its off what do I need to do to turn it on?
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Aug 4, 2007
I know someone probably asked this question... I am looking for a VPS provider that offers unmanaged VPSes with FreeBSD + Cpanel, 512RAM guaranteed, ~250-300GB bw, and 10-15GB hdd, for a price of $40-55/mo.
Can anyone recommend a good VPS provider that meets the above requirements?
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Jul 9, 2007
Can anyone please suggest a good FreeBSD VPS hoster?
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Apr 9, 2009
I haven't really messed with FreeBSD very much, but I'm picking up a FreeBSD server and needed to know of a good free firewall for it.
On my CentOS/Debian servers I use CSF and have had good luck with it, so I would like something like that if there is one out there.
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Jul 10, 2008
I installed FreeBSD 6.3 with minimum packedges. (pkg.txt on attach)
Install Apache+PHP+MySQL
But then I load Drupal or Magento (CMS) browser say that:
Warning: include_once(includes/install.inc) [function.include-once]: failed to open stream: No such file or directory in /ftp/drupal.web/includes/database.inc on line 129
Warning: include_once() [function.include]: Failed opening 'includes/install.inc' for inclusion (include_path='/usr/local/share/phpmailer') in /ftp/drupal.web/includes/database.inc on line 129
Fatal error: Call to undefined function install_goto() in /ftp/drupal.web/includes/database.inc on line 130
I didn't udestand WHY?
In joomla and wordpress all work normla.
In attacment I send apache and php configs.
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Feb 11, 2008
I am using FreeBSD with Cpanel.
df -h:
Filesystem Size Used Avail Capacity Mounted on
/dev/twed0s1a 496M 491M -35M 108% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/twed0s1h 86G 67G 12G 85% /home
/dev/twed0s1d 248M 21M 207M 9% /tmp
/dev/twed0s1g 15G 6.9G 6.5G 51% /usr
/dev/twed0s1f 4.8G 3.6G 827M 82% /var
procfs 4.0K 4.0K 0B 100% /proc
This is creating Problem at Cpanel,How can i recover space from /dev/twed0s1a.
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Feb 1, 2008
My system is affected with something named __sbmaskrune
I can't connect to FTP at this moment..
I am running FreeBSD
/scripts/ftpup
Ftp Setup Script Version 6.1
This is the proftpd installer
Searching ports for proftpd .....................................found proftpd in /usr/ports/ftp/proftpd....Done
proftpd (1.3.1-1) is already installed.
dedi01# /scripts/ftpup --force
Ftp Setup Script Version 6.1
This is the proftpd installer
/libexec/ld-elf.so.1: /usr/local/lib/libruby18.so.18: Undefined symbol "__sbmaskrune"
Removing old ftp server (pure-ftpd)
pkg_delete: no packages match pattern(s)
The ProFTPd configuration file /usr/local/etc/proftpd.conf appears to be ok!
No matching processes were found
Waiting for ftpserver to restart..............finished.
ftpserver has failed,
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Jan 8, 2008
gAs per MySQL official page [url]
there is no MySQL 5.0.51 available for FreeBSD.
The latest available version is 5.0.45
5.0.51 was officially released more than a month ago.
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Apr 8, 2008
We are basically looking for advice on which OS to choose. CentOS appeals as it is basically RHEL - and since people are paying for that they must be doing something right. It is apparently uber stable because the versions have been tested to death... but because the packages are so out of date, or just not there, we will need to install many things from source, which defeats the point to using it for its stability.
FreeBSD seems to have an awful lot of up to date packages, took a look at it on Distrowatch and was very impressed by many are the latest versions. This would make life so much easier because the package manager can handle installs and updates, really can't be bothered with messing around compiling software for install/updates.
In my mind, if an open source project as mature as the likes of Apache, PHP or MySQL, I am pretty sure you are very unlikely to experience problems by using the latest stable version. Surely by using older versions you are more likely to experience problems as of the result of bugs/security exploits that have only been fixed in the more recent releases.
Would you use FreeBSD or CentOS/RHEL? Or are both equally as good?
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Oct 8, 2007
i having an issue with FreeBSD...
I have a Raid5 setup and working fine, I just put 2 new 18gig drives for raid1.
Now i see in dmesg this.
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 104193MB (213387264 sectors) RAID 5 (optimal)
amrd1: <LSILogic MegaRAID logical drive> on amr0
amrd1: 17365MB (35563520 sectors) RAID 1 (optimal)
In bold is the 'new' array.
in fdisk i get....
fdisk /dev/amrd1
******* Working on device /dev/amrd1 *******
parameters extracted from in-core disklabel are:
cylinders=2213 heads=255 sectors/track=63 (16065 blks/cyl)
Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=2213 heads=255 sectors/track=63 (16065 blks/cyl)
fdisk: invalid fdisk partition table found
Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:
The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 35551782 (17359 Meg), flag 80 (active)
beg: cyl 0/ head 1/ sector 1;
end: cyl 164/ head 254/ sector 63
The data for partition 2 is:
<UNUSED>
The data for partition 3 is:
<UNUSED>
The data for partition 4 is:
<UNUSED>
I get write errors when i use sysinstall. As for the raid status. Its fine.
Logical Drive : 1( Adapter: 0 ): Status: OPTIMAL
---------------------------------------------------
SpanDepth :01 RaidLevel: 1 RdAhead : Adaptive Cache: CachedIo
StripSz :064KB Stripes : 2 WrPolicy: WriteThru
Logical Drive 1 : SpanLevel_0 Disks
Chnl Target StartBlock Blocks Physical Target Status
---- ------ ---------- ------ ----------------------
0 00 0x00000000 0x021ea800 ONLINE
0 03 0x00000000 0x021ea800 ONLINE
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Feb 11, 2007
I've been using FreeBSD for a while now, but I still feel like a novice when looking at top because I don't understand or know what all of the STATES mean. I know that many of them represent different kernal states and certain programs have their own unique STATES, but what do the usuals mean? man top only has 2-3 listed with very vague descriptions.
Does anyone here understand many of them? If so it would be greatly appreciated if you could write up a few of the basic ones.
select
nanslp
kserel
RUN
pause
lockf
kqread
sbwait
pipered
Those are the ones I currently see in top. I know there are probably thosands of others, but those are the ones I usally look at.
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Mar 15, 2007
after many painstaking hours, im at a loss as to where to go now (finally managed to get up to the point of running phpize in the ffmpeg directory)
...
Originally I thought i had compiled it in when compiling PHP,
Infact:
Code:
'./configure' '--disable-debug' '--disable-rpath' '--with-bz2' '--with-curl' '--with-gd' '--with-openssl' '--with-png' '--with-zlib' '--with-mcrypt' '--with-mysql' '--with-pear' '--enable-bcmath' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--with-ffmpeg=yes' '--with-apxs2=/usr/local/sbin/apxs'
But when i go to the tests/ffmpeg_test.php file I get:
Code:
Warning: dl() [function.dl]: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20020429/ffmpeg.so' - Cannot open "/usr/local/lib/php/extensions/no-debug-non-zts-20020429/ffmpeg.so" in /usr/local/www/apache22/data/tests/test_ffmpeg.php on line 17
Can't load extension /usr/local/lib/php/extensions/no-debug-non-zts-20020429/ffmpeg.so
I used the ports tree to install FFMPEG and here is the version info:
Code:
bsd# ffmpeg -v
ffmpeg version 0.4.9-pre1, build 4718, Copyright (c) 2000-2004 Fabrice Bellard
built on Mar 14 2007 20:42:22, gcc: 3.4.6 [FreeBSD] 20060305
After finally getting to this point, i say the heck with it and just decide to try and use phpize and compile it in that way as an extension ( following: http://ffmpeg-php.sourceforge.net/ ).
However, after I got phpize to work ( had to cp autoconf259 and autoheader259 to autoconf and autoheader since it was complaining about it ), it gave me this set of errors:
Code:
/bin/sh /usr/local/src/ffmpeg-php-0.5.0/libtool --mode=compile gcc -I. -I/usr/local/src/ffmpeg-php-0.5.0 -DPHP_ATOM_INC -I/usr/local/src/ffmpeg-php-0.5.0/include -I/usr/local/src/ffmpeg-php-0.5.0/main -I/usr/local/src/ffmpeg-php-0.5.0 -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/ffmpeg -DHAVE_CONFIG_H -g -O2 -Wall -fno-strict-aliasing -c /usr/local/src/ffmpeg-php-0.5.0/ffmpeg-php.c -o ffmpeg-php.lo
gcc -I. -I/usr/local/src/ffmpeg-php-0.5.0 -DPHP_ATOM_INC -I/usr/local/src/ffmpeg-php-0.5.0/include -I/usr/local/src/ffmpeg-php-0.5.0/main -I/usr/local/src/ffmpeg-php-0.5.0 -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/ffmpeg -DHAVE_CONFIG_H -g -O2 -Wall -fno-strict-aliasing -c /usr/local/src/ffmpeg-php-0.5.0/ffmpeg-php.c -fPIC -DPIC -o ffmpeg-php.o
In file included from /usr/local/src/ffmpeg-php-0.5.0/ffmpeg-php.c:25:
/usr/local/include/ffmpeg/avcodec.h:14:27: ffmpeg/common.h: No such file or directory
In file included from /usr/local/include/ffmpeg/avcodec.h:15,
from /usr/local/src/ffmpeg-php-0.5.0/ffmpeg-php.c:25:
/usr/local/include/ffmpeg/rational.h: In function `av_cmp_q':
/usr/local/include/ffmpeg/rational.h:36: error: syntax error before "tmp"
/usr/local/include/ffmpeg/rational.h:38: error: `tmp' undeclared (first use in this function)
/usr/local/include/ffmpeg/rational.h:38: error: (Each undeclared identifier is reported only once
/usr/local/include/ffmpeg/rational.h:38: error: for each function it appears in.)
In file included from /usr/local/src/ffmpeg-php-0.5.0/ffmpeg-php.c:26:
/usr/local/include/ffmpeg/avformat.h: In function `av_init_packet':
/usr/local/include/ffmpeg/avformat.h:48: warning: implicit declaration of function `int64_t_C'
/usr/local/include/ffmpeg/avformat.h:48: warning: integer constant is too large for "long" type
/usr/local/include/ffmpeg/avformat.h:49: warning: integer constant is too large for "long" type
*** Error code 1
Stop in /usr/local/src/ffmpeg-php-0.5.0.
After I get all this working and install it on a another machine I plan on writing a guide for FreeBSD users inside the tutorials section - but this one part has stumped me.
The only thing I can think of is something along the lines of maybe i downloaded a 64 bit version of something along the way?
Should i continue along this route with phpize adding it as an extension, or does someone else have some information on that ffmpeg_test.php file?
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Oct 1, 2007
I plan to install one server with RAID with that run on a dedicated card which support FreeBSD. As i have not much experience in this,
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Feb 5, 2007
i created a new cron job with "crontab -e" command by using the "root" user.
* * * * * php -f /path/file.php
i tried it for php -q too. while i type this command on the shell the php file works. there is no problem with crontab rule too. the chmod of file.php is 777, user root group wheel..
but it cant work. i couldnt understand why it aint.
i created a shell file and changed the cron like:
* * * * * /path/file.sh
and in file.sh:
#!/bin/sh
php -q /path/file.php
mkdir /path/anydir
so, /path/anydir have been created but file.php not executed. so the problem is not about cron rule.
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Dec 27, 2007
This is the current setup for the user (which is a normal setup)
ISP
|
switch
|WAN |LAN 10.10.10.0/24
servers
switch is a cisco 2924XL
So on the servers there's dual ports one serves for WAN traffic and the other serves Local traffic.
Ive added in the sysctl net.link.ether.inet.log_arp_wrong_iface = 0 still no affect.
error...
Quote:
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
arp: IP_ADDRESS is on fxp0 but got reply from HW_ADDRESS on fxp1
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Oct 25, 2007
whats the command to find out what file system do i use on my FreeBSD server?
Linux Cat didnt worked out.
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Oct 20, 2007
I'm facing this issue with FreeBSD 6.2.
After FreeBSD 6.2 install completely with no errors, the server is rebooted, then it says "no boot loader" even though the boot loader was installed during the setup.
I have tried to reinstall several times by 3 different sources, but no lucks.
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