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10-14-2012, 07:31 AM
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Member
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Join Date: Jul 2012
Posts: 14
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Download starts delayed
Hello
I hosted sites that have heavy traffic , this sites use more than 2TB bandwidth per day
Now i use trial 2-CPU LiteSpeed License
But a serious problem , sometimes server don't accept new connection or accept it late ,
Server information :
Processor 2 x E5620 2.40Ghz HT
Memory 24GB DDR3 ECC Memory
Hard Drive 4 x 2TB SAS 7,200 RPM
Raid H700 Raid Controller with BBU - Raid 10
IO wait :
Code:
root@ [~]# iostat -x
Linux 2.6.32-279.9.1.el6.x86_64 10/14/2012 _x86_64_ (16 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
0.43 0.39 3.02 8.37 0.00 87.78
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 488.05 26.18 774.56 9.47 95965.97 280.25 122.76 43.33 55.26 1.18 92.19
sdb 381.67 160.30 653.17 5.51 81479.33 1325.98 125.71 32.48 49.32 1.24 81.84
dm-0 0.00 0.00 0.01 0.00 0.06 0.00 7.95 0.00 11.84 8.11 0.01
dm-1 0.00 0.00 0.42 0.79 18.94 6.33 20.86 0.05 42.67 15.56 1.88
dm-2 0.00 0.00 0.03 4.92 0.27 39.34 8.00 0.25 49.54 23.61 11.68
dm-3 0.00 0.00 0.02 0.00 1.26 0.01 67.89 0.00 44.77 26.06 0.05
dm-4 0.00 0.00 5.77 17.97 189.97 143.74 14.06 1.87 78.93 2.34 5.55
dm-5 0.00 0.00 0.53 7.54 10.74 60.31 8.80 1.13 139.75 3.04 2.45
dm-6 0.00 0.00 2315.83 169.42 177011.65 1355.38 71.77 22.24 8.92 0.40 99.30
dm-7 0.00 0.00 1.68 0.14 212.16 1.12 117.37 0.09 51.55 14.44 2.62
connection (Real time status) :
Code:
Http In 31KB Http Out 103,030KB
Https In 0KB Https Out 0KB
Max 122,880 Idle 86
Http Used 16,696 Http Free 106,184
Https Used 0 Https Free 40,960
In Processing 16,610 Req/Sec 62.1
Total Req 75,271 Total Cache Hits 0
Cache Hit Rate 0% Cache Hits/Sec 0.0
Load is ok , i/o wait is ok , i think configuration is ok too
but i don't know why server don't accept new connection and this problem has caused connection time out or Download starts delayed
i attached number of connection screenshot and tuning configuration
please some one help me
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10-14-2012, 09:49 AM
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LiteSpeed Staff
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Join Date: May 2003
Location: New Jersey
Posts: 7,603
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You need to check ip_conntrack limit, check output of 'dmesg', if the limit has been hit, you need to google it for solution.
Also, with your server, we recommend enabling "AIO" if you are serving tons of static files.
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10-14-2012, 06:50 PM
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LiteSpeed Staff
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Join Date: Sep 2009
Posts: 2,291
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I noticed "Http Out: 103,030KB", this already reach or over the 1G bps NIC's capability. maybe a good example though: the bottle neck is at NIC, not litespeed or others.
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10-16-2012, 12:49 AM
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Member
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Join Date: Jul 2012
Posts: 14
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I have 6 account on this server ( i use cPanel )
in account 1,2,4,5 download start fast
but in other account we get time out
what can i do ?
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10-16-2012, 07:42 AM
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Member
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Join Date: Jul 2012
Posts: 14
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I'm really confused
download start in some account is very fast
but in some account is very late
The strange thing is , in accounts that have more connection than others , downloads start fast
!
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10-16-2012, 11:42 AM
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LiteSpeed Staff
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Join Date: Oct 2010
Posts: 2,389
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is the download via php or direct static?
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10-16-2012, 12:36 PM
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Member
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Join Date: Jul 2012
Posts: 14
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Hello
in all of them , download is directly
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10-17-2012, 08:49 AM
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Member
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Join Date: Jul 2012
Posts: 14
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please help me 
i also revive some emails like that
Code:
At [15/Oct/2012:17:00:22 +0100], web server with pid=17081 received unexpected signal=11, a core file is created. A new instance of web server will be started automatically!
Please forward the following debug information to bug@litespeedtech.com.
Environment:
Server: LiteSpeed/4.2 Enterprise
OS: Linux
Release: 2.6.32-279.9.1.el6.x86_64
Version: #1 SMP Tue Sep 25 21:43:11 UTC 2012
Machine: x86_64
If the call stack information does not show up here, please compress and forward the core file located in /tmp/lshttpd/.
[New Thread 17081]
[New Thread 17083]
[New Thread 17085]
[Thread debugging using libthread_db enabled]
Core was generated by `litespeed'.
Program terminated with signal 11, Segmentation fault.
#0 0x00000000004c6ab4 in HttpContext::getSecRuleSets (this=0x23ff310) at /home/gwang/release/httpd/httpd/http/httpcontext.h:516
in /home/gwang/release/httpd/httpd/http/httpcontext.h
#0 0x00000000004c6ab4 in HttpContext::getSecRuleSets (this=0x23ff310) at /home/gwang/release/httpd/httpd/http/httpcontext.h:516
#1 0x00000000004bd48c in HttpConnection::processModSecRules (this=0x6ea6ec0, phase=32) at /home/gwang/release/httpd/httpd/http/httpconnection.cpp:202
#2 0x00000000004bd55d in HttpConnection::nextRequest (this=0x6ea6ec0) at /home/gwang/release/httpd/httpd/http/httpconnection.cpp:218
#3 0x00000000004c230b in HttpConnection::writeComplete (this=0x6ea6ec0) at /home/gwang/release/httpd/httpd/http/httpconnection.cpp:2161
#4 0x00000000004c23e3 in HttpConnection::doWrite (this=0x6ea6ec0, aioSent=0) at /home/gwang/release/httpd/httpd/http/httpconnection.cpp:2183
#5 0x00000000004c258d in HttpConnection::onWriteEx (this=0x6ea6ec0) at /home/gwang/release/httpd/httpd/http/httpconnection.cpp:2241
#6 0x000000000046bb2d in HttpIOLink::doWrite (this=0x6ea6ec0) at /home/gwang/release/httpd/httpd/http/httpiolink.h:162
#7 0x000000000046a544 in HttpIOLink::onWriteT (pThis=0x6ea6ec0) at /home/gwang/release/httpd/httpd/http/httpiolink.cpp:913
#8 0x0000000000468d13 in HttpIOLink::handleEvents (this=0x6ea6ec0, evt=4) at /home/gwang/release/httpd/httpd/http/httpiolink.cpp:180
#9 0x00000000005035a6 in epoll::waitAndProcessEvents (this=0x251f6c0, iTimeoutMilliSec=100) at /home/gwang/release/httpd/httpd/edio/epoll.cpp:333
#10 0x0000000000456d94 in EventDispatcher::run (this=0x23ccf98) at /home/gwang/release/httpd/httpd/http/eventdispatcher.cpp:225
#11 0x000000000041515d in HttpServerImpl::start (this=0x23ccf70) at /home/gwang/release/httpd/httpd/main/httpserver.cpp:473
#12 0x000000000041835b in HttpServer::start (this=0x8926f0) at /home/gwang/release/httpd/httpd/main/httpserver.cpp:1890
#13 0x000000000040eebb in LshttpdMain::main (this=0x23ccbb0, argc=1, argv=0x7fffe8646798) at /home/gwang/release/httpd/httpd/main/lshttpdmain.cpp:1840
#14 0x000000000040a63f in main (argc=1, argv=0x7fffe8646798) at /home/gwang/release/httpd/httpd/main.cpp:124
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