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IDS Forum

Re: Random Server Slowdown "Redone"

Posted By: CESAR MARTINS
Date: Friday, 15 January 2010, at 11:54 a.m.

In Response To: Re: Random Server Slowdown "Redone" (JAVIER HERNáNDEZ)

Hi Javier,

Based on your explanation, the network could be the problem ... but it is not easy to affirm.

If the slowness is only on the hosts where has a value in Q-Send, you should check the network of this hosts. Talk with your network administrator.

Now to solve this problem, I would monitor the hosts where is the application and would check the network settings such QOS drivers...

Regards
Cesar

Posted By: JAVIER HERNáNDEZ <Send E-Mail>
Date: Friday, 15 January 2010, at 10:53 a.m.

In Response To: Random Server Slowdown "Redone" (JAVIER HERNáNDEZ)

UPDATE

After implementing your suggestions in the instance we have encountered a irregularity in the operation of the server and I need to ask for your help.

At some point we got the suggestion that it could be a network problem, so I checked the network statistics of the server and foun this when I run the command "netstat --inet -n -e -c"

Active Internet connections (w/o servers)

Proto Recv-Q Send-Q Local Address Foreign Address State User Inode

tcp 471 0 192.168.10.12:1526 192.168.11.25:1319 ESTABLISHED 0 0

tcp 496 0 192.168.10.12:1526 192.168.10.252:1119 ESTABLISHED 500 109189

tcp 0 0 192.168.10.12:1526 192.168.16.73:2389 ESTABLISHED 500 107466

tcp 0 0 192.168.10.12:1526 192.168.10.9:36629 ESTABLISHED 500 79234

tcp 473 0 192.168.10.12:1526 192.168.10.123:1124 ESTABLISHED 0 0

tcp 0 0 192.168.10.12:1526 192.168.10.7:60975 ESTABLISHED 500 109004

tcp 0 0 192.168.10.12:1526 192.168.10.7:60972 ESTABLISHED 500 109002

tcp 0 0 192.168.10.12:1526 192.168.10.7:60970 ESTABLISHED 500 108998

tcp 0 0 192.168.10.12:1526 192.168.10.7:60971 ESTABLISHED 500 109000

tcp 0 0 192.168.10.12:1526 192.168.10.7:60968 ESTABLISHED 500 108993

tcp 0 0 192.168.10.12:1526 192.168.10.7:60969 ESTABLISHED 500 108996

tcp 0 0 192.168.10.12:1526 192.168.16.69:2161 ESTABLISHED 500 53514

tcp 0 0 192.168.10.12:1526 192.168.10.7:60966 ESTABLISHED 500 108989

tcp 0 0 192.168.10.12:1526 192.168.10.9:42792 ESTABLISHED 500 109030

tcp 0 0 192.168.10.12:1526 192.168.10.7:60967 ESTABLISHED 500 108991

tcp 0 0 192.168.10.12:1526 192.168.10.9:42793 ESTABLISHED 500 109032

tcp 0 0 192.168.10.12:1526 192.168.10.7:60964 ESTABLISHED 500 108987

tcp 0 0 192.168.10.12:1526 192.168.10.9:42794 ESTABLISHED 500 109034

tcp 0 0 192.168.10.12:1526 192.168.10.9:42795 ESTABLISHED 500 109036

tcp 0 0 192.168.10.12:1526 192.168.10.7:33314 ESTABLISHED 500 14715

tcp 0 0 192.168.10.12:1526 192.168.10.9:42796 ESTABLISHED 500 109038

tcp 0 0 192.168.10.12:1526 192.168.10.7:33315 ESTABLISHED 500 14717

tcp 0 0 192.168.10.12:1526 192.168.10.9:42797 ESTABLISHED 500 109040

tcp 0 0 192.168.10.12:1526 192.168.10.9:42798 ESTABLISHED 500 109042

tcp 0 0 192.168.10.12:1526 192.168.10.9:37679 ESTABLISHED 500 87222

tcp 0 0 192.168.10.12:1526 192.168.10.9:42799 ESTABLISHED 500 109044

tcp 0 0 192.168.10.12:1526 192.168.10.9:42800 ESTABLISHED 500 109046

tcp 0 0 192.168.10.12:1526 192.168.10.9:42801 ESTABLISHED 500 109048

tcp 0 0 192.168.10.12:1526 192.168.10.9:42802 ESTABLISHED 500 109050

tcp 0 0 192.168.10.12:1526 192.168.10.7:60724 ESTABLISHED 500 108686

tcp 0 0 192.168.10.12:1526 192.168.10.7:60722 ESTABLISHED 500 108682

tcp 0 0 192.168.10.12:1526 192.168.10.7:60723 ESTABLISHED 500 108684

tcp 0 0 192.168.10.12:1526 192.168.10.7:60720 ESTABLISHED 500 108678

tcp 0 0 192.168.10.12:1526 192.168.10.7:60721 ESTABLISHED 500 108680

tcp 0 0 192.168.10.12:1526 192.168.10.9:36961 ESTABLISHED 500 84071

tcp 0 0 192.168.10.12:1526 192.168.10.7:37217 ESTABLISHED 500 52751

tcp 0 0 192.168.10.12:1526 192.168.10.9:42865 ESTABLISHED 500 109171

tcp 0 0 192.168.10.12:1526 192.168.10.9:42866 ESTABLISHED 500 109173

tcp 0 0 192.168.10.12:1526 192.168.10.9:42867 ESTABLISHED 500 109175

tcp 0 0 192.168.10.12:1526 192.168.10.9:42868 ESTABLISHED 500 109177

tcp 0 0 192.168.10.12:1526 192.168.10.9:42869 ESTABLISHED 500 109179

tcp 0 0 192.168.10.12:1526 192.168.10.7:60535 ESTABLISHED 500 108275

tcp 0 0 192.168.10.12:1526 192.168.16.65:1232 ESTABLISHED 500 73047

tcp 0 0 192.168.10.12:1526 192.168.10.9:38035 ESTABLISHED 500 88585

tcp 0 0 192.168.10.12:1526 192.168.10.9:36545 ESTABLISHED 500 78167

tcp 0 0 192.168.10.12:1526 192.168.10.7:40140 ESTABLISHED 500 71267

tcp 0 0 192.168.10.12:1526 192.168.10.9:36546 ESTABLISHED 500 78169

tcp 471 0 192.168.10.12:1526 192.168.11.24:2515 ESTABLISHED 0 0

tcp 0 0 192.168.10.12:1526 192.168.10.7:32966 ESTABLISHED 500 109122

tcp 0 0 192.168.10.12:1526 192.168.10.7:32964 ESTABLISHED 500 109118

tcp 0 0 192.168.10.12:1526 192.168.10.7:32965 ESTABLISHED 500 109120

tcp 0 0 192.168.10.12:1526 192.168.10.7:32962 ESTABLISHED 500 109114

tcp 0 0 192.168.10.12:1526 192.168.10.7:32963 ESTABLISHED 500 109116

tcp 0 0 192.168.10.12:1526 192.168.10.9:37857 ESTABLISHED 500 87999

tcp 0 0 192.168.10.12:1526 192.168.10.9:42721 ESTABLISHED 500 108838

tcp 0 0 192.168.10.12:1526 192.168.10.9:42722 ESTABLISHED 500 108840

tcp 0 0 192.168.10.12:1526 192.168.10.7:40173 ESTABLISHED 500 71282

tcp 0 0 192.168.10.12:1526 192.168.10.9:42723 ESTABLISHED 500 108842

tcp 0 0 192.168.10.12:1526 192.168.10.9:37092 ESTABLISHED 500 85352

tcp 0 0 192.168.10.12:1526 192.168.10.9:42724 ESTABLISHED 500 108844

tcp 0 0 192.168.10.12:1526 192.168.11.28:1528 ESTABLISHED 500 109185

tcp 0 0 192.168.10.12:1526 192.168.10.9:38394 ESTABLISHED 500 90688

tcp 0 0 192.168.10.12:1526 192.168.10.7:40181 ESTABLISHED 500 71316

tcp 0 0 192.168.10.12:1526 192.168.10.9:38395 ESTABLISHED 500 90690

tcp 0 0 192.168.10.12:1526 192.168.10.7:40178 ESTABLISHED 500 71302

tcp 0 0 192.168.10.12:1526 192.168.10.7:40179 ESTABLISHED 500 71310

tcp 0

As you can see, the second column in most of the conections is "0" but for the clients that suffer the slowdown some times we got data in the que for as much as 20 seconds, then suddenly if "flows" again and we get responce from the server.

At some point in the day this situation gets so bad that the application responce goes from seconds (normal) to several minutes for each item that is consulted.

Have you seen this behabior and if yes, do you know whow to diagnose and/or correct??

For your info, the client was using ODBC in Windows XP to conect to the DB, since yesterday we changed the conection to the native Informix .NET provider, the problem is not as severe as befor but still it presents.

Thanks for any help.

Javier Hernández

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