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• Apache not running from rc.d on FreeBSD

  - by Oksana Molotova

  I'm using FreeBSD 8.3 and Apache 2.2. I didn't install Apache from ports, instead compiled it from source because I wanted to move the binary and configuration to a different path (I'm centering all of the major production daemons and their configurations in a single place). In any case, I based the /usr/local/etc/rc.d/apache22 file on one from a different server where it was installed from ports, I only modified the binary and config paths within. I can manually execute it with /usr/local/etc/rc.d/apache22 start, however even with apache22_enable="YES" in /etc/rc.conf it fails to start. All permissions and ownership are identical to the other server where it works. What am I missing and is there a way to debug this kind of thing?

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• Obtain newer version of NetSNMP for CentOS 5

  - by jtnire

  I'm using CentOS 5. I have a need to use net-snmp version "net-snmp-utils-5.5-37.el6_2.1.x86_64" which is currently available in CentOS 6 but not in CentOS 5. The reason I need this version (or greater) is because there is a new supported option added to the config files that I need for my setup. It would be very much appreciated if someone would give me some steps to install this version (or greater) on my production CentOS 5 systems. Upgrading to CentOS 6 is currently not an option. Any help would be appreciated. Thanks

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• Performance issue when configuring non HA VM in cluster

  - by laiys

  Hi, I saw this article http://technet.microsoft.com/en-us/library/cc764243.aspx Quote taken from the link “ Important It is recommended that you not deploy virtual machines that are not highly available on your host clusters. Although you can do this by using Hyper-V (VMM does not allow it), the non-highly available virtual machines will consume resources that otherwise would be available to the HAVMs What kind of resources (CPU,memory, NIC, etc) that non HA VM will consume? Just curious as not all VM (in production) not to be in Failover Cluster and Live Migration. If i put the VM into CSV but did not make it as HA, what impact does it make since i allocate same vCPU, vNic and VMemory into the VM. (not to mention that i lost failover feature). Curious to understand more about this. Please advise. Thanks

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• Access to NTP via IP which doesn't change often

  - by faulty

  I'm trying to sync the clock of our production server located in a data center with pool.ntp.org. For security reason, our servers has no internet access unless we requested to open specific ip/port explicitly. I worked out a list of IPs based on 0.asia.ntp.org 1.asia.ntp.org 2.asia.ntp.org 3.asia.ntp.org Not realizing ntp.org is using round robin DNS and the servers being voluntary, they changes from time to time. In fact the IP I've got from 3.asia.ntp.org last month is no longer working now. I'm wondering if there's a publicly known NTP server that doesn't change as often or if there's a way to go around this without having to request an update to the firewall on a monthly basis. I believe many admin is facing the same issue here.

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• zabbix 2.2.1 no graphs in Web scenario

  - by Mick

  Hello for some time I have a problem with graphs in web scenarios on Zabbix 2.2.1, I put below the screen, this problem has appeared at every graph of web scenario This same scenario installed a second zabbixie that runs on my local virtual machine with zabbix. In my local machine all components of zabbix (server, frontend, agents), but in my production zabbix only zabbix frontend are separated from each other. Scenario for openerp ============================== Name: OpenERP Web Checks Application: New application: Authentication: Update interval (in sec): 60 Retries: 1 Agent: Internet Explorer 10.0 Steps: ============================== Name: OpenERP login page URL: http://openerp.test.com Post: Variables: Timeout: 15 Required string: Required status codes: 200 My zabbix server performance: Anybody have some idea how fix it ? Regards Mick

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• Exchange Disconnecting on EHLO with remote telnet

  - by Timothy Baldridge

  When I go to the local terminal on my Exchange box (SBS 2008) I can do this: telnet 127.0.0.1 25 220 Exchange banner here EHLO example.com 250 Server name However when I go from another box, or from the actual IP of the server I get this: telnet 192.168.21.20 25 220 Exchange banner here EHLO example.com 421 4.4.1 Connection timed out Connection to host lost. The odd thing is, this server is currently in production and working fine (receiving mail for our entire domain). But my C# programs can't send mail to it (they get this same error). Any ideas?

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• Oracle EE 11.2g: how to generate fresh new redo logs

  - by Aikanaro

  Hi, In the company I work for we are heavy users of vmware machines. Almost all our projects are developed inside a virtual environment up to the point where we have to deploy them into a production system. While in development, some colleagues of mine deleted the redo log files for Oracle in the hopes of gaining some free space. Now they are unable to start the database instance. Is there a way of generating a fresh new redo log so that the instance can be started? This is urgent and even though I'm currently googling for an answer I have yet to find it. Thanks in advance.

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• What causes winsock 10055 errors? How should I troubleshoot?

  - by Tom Kerr

  I'm investigating some issues with winsock 10055 errors on a chain of custom applications (some of which we control, some not) and was hoping to get some advice on techniques to troubleshoot the problem. No buffer space available. An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. From research, non-paged pool and ports seem to be the only resources which can cause this error. Is there another resource which might cause 10055 errors? Currently, we have perfmon counters setup on the applications and non-paged pool usage looks low in most circumstances. Open TCP connections looks low and I am unaware of another way to monitor ports. Since it only happens in production, we are unable to use more invasive counters. Is there some other tool or procedure you would recommend to diagnose which application is causing the issue?

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• SQL Performance Problem IA64

  - by Vendoran

  We’ve got a performance problem in production. QA and DEV environments are 2 instances on the same physical server: Windows 2003 Enterprise SP2, 32 GB RAM, 1 Quad 3.5 GHz Intel Xeon X5270 (4 cores x64), SQL 2005 SP3 (9.0.4262), SAN Drives Prod: Windows 2003 Datacenter SP2, 64 GB RAM, 4 Dual Core 1.6 GHz Intel Family 80000002, Model 6 Itanium (8 cores IA64), SQL 2005 SP3 (9.0.4262), SAN Drives, Veritas Cluster I am seeing excessive Signal Wait Percentages ( 250%) and Page Reads /s (50) and Page Writes /s (25) are both high occasionally. I did test this query on both QA and PROD and it has the same execution plan and even the same stats: SELECT top 40000000 * INTO dbo.tmp_tbl FROM dbo.tbl GO Scan count 1, logical reads 429564, physical reads 0, read-ahead reads 0, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0. As you can see it’s just logical reads, however: QA: 0:48 Prod: 2:18 So It seems like a processor related issue, however I’m not sure where to go next, any ideas? Thanks, Aaron

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• Lot of FIN_WAIT2, CLOSE_WAIT , LAST_ACK and TIME_WAIT in Haproxy

  - by Tux

  We are running haproxy in production for around 10k+ concurrent users . But we are seeing lot of FIN_WAIT2, CLOSE_WAIT , LAST_ACK and TIME_WAIT in the netstat output. This output is on a 8G ubuntu-12.04 node. 8046 CLOSE_WAIT 1 CLOSING 1 established) 40869 ESTABLISHED 1212 FIN_WAIT1 7575 FIN_WAIT2 1 Foreign 2252 LAST_ACK 7 LISTEN 143 SYN_RECV 4920 TIME_WAIT Can someone please tell me what tweaking i need to do. Please note that all these connections are persistent connections . tcp_fin_timeout = 30 tcp_keepalive_time = 1800 Right now, the application is working fine. But wondering will be there any issues as we add more users to this haproxy node.

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• Percona MySQL 5.5 fails to start

  - by keymone

  trying to setup new server here but keep getting this in error log: mysqld_safe Starting mysqld daemon with databases from /data/mysql/myisam [Warning] Can't create test file /data/mysql/myisam/hostname.lower-test [Warning] Can't create test file /data/mysql/myisam/hostname.lower-test [Note] Flashcache bypass: disabled [Note] Flashcache setup error is : setmntent failed /usr/sbin/mysqld: File '/var/mysql/bin/bin-log.index' not found (Errcode: 13) [ERROR] Aborting [Note] /usr/sbin/mysqld: Shutdown complete mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended everything under /data/mysql (it's ibdata and myisam folders) is owned my mysql:mysql and has proper permissions same goes for folders with bin and relay logs under /var/mysql apparmor is purged from server any ideas? PS it seems like something else apart from apparmor is affecting permissions to access mysql files after i changed data directory to more default one - /var/lib/mysql and "Can't create test file" error is gone, but "'/var/mysql/bin/bin-log.index' not found (Errcode: 13)" is still there PPS so i installed apparmor back and added all folders to mysqld's profile and errors mentioned above are now gone(or mysql doesn't even get to that point now) what i have now is this: /usr/sbin/mysqld: error while loading shared libraries: libpthread.so.0: cannot open shared object file: No such file or directory banging my head against the wall.

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• Migrating data from SQL Server 2000 to SQL Server 2005

  - by Muhammad Kashif Nadeem

  I have to migrate existing data which is in SQL Server 2000 to SQL Server 2005. The schema of two databases is different. For Example Locations table in SS2000 is split into two tables and has different columns. This is one time activity. After successful migration I don't need old db anymore. What is the best way to transfer data from one SQL Server to another having different schemas? I can write stored procedures to fetch data from SQL Server 2000 and insert/update tables in SQL Server 2005. What about SSIS? I don't have any experience with this and is this better to create package of SSIS because I don't need this again and need to learn it first. Thanks.

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• AWS RDS MySQL remote connection extremely slow

  - by nute

  I have a site hosted on AWS EC2 (Elastic Beanstalk), with a MySQL database hosted on AWS RDS. Everything works fine on the production server, fast and all. However when I try to connect remotely from my local machine, it sometimes gets extremely slow (like 4 minutes to load the list of tables), or simply times out. I added my IP in the security group (which I did correctly, since it sometimes works). When it doesn't work, I at the same time check the prod server and it still looks good.

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• How to set up RAID 1 on Dell PERC S300 With Existing OS Install

  - by Daniel Dugger

  We have a server that is being used in production, but it was not originally meant to. The main thing I want to add to it is a Dell PERC S300 RAID Card to have the main hard drive (Windows Server 2008 R2) mirrored on another hard drive. I can not initialize the disk and wipe the the OS to create the array and then re-install. Is there a way to create the array with a current hard drive, without affecting it, and just mirroring the drive? If that card is not an option, is there a card that would allow that? The server is a Dell PowerEdge T110 II.

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• Alternative, more efficient scraping method for a noncoder, than Google doc's importxml and xpath?

  - by binarybunny

  I've searched throughout the net for a simple solution, but it seems everyone has their own unique method (coding language) of achieving this. I'm only just beginning to learn Linux, and my coding skills are thoroughly lacking (non-existent). I love the simplicity of using importxml and xpath, but copying and pasting values after reaching the spreadsheet limit of 50 is getting old. Now that I've seen the light, I would really just like to know of a simple, yet scalable solution to get more data into more spreadsheets/databases. Before I really start getting my hands dirty, I would love to know some of the ways you guys go about accomplishing this?

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• How can I display and log PHP errors on IIS7?

  - by Ben

  We're running PHP 5.2.5 on an IIS 7 Server and we're having problems making PHP errors visible... At the moment whenever we have a PHP error the server sends back a 500 error with the message "The page cannot be displayed because an internal server error has occurred." This might be a good setting for production websites but it's rather annoying on a development server... ;-) I have tried configuring php.ini to display errors to the screen as well as log them to a specific folder but it seems that the Server catches all errors before and prevents and handling by PHP... Does someone know what we have to do to make IIS display PHP errors on screen? Any links, tipps or tutorials on the subject would be appreciated!

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• How to test TempDB performance?

  - by Matt Penner

  I'm getting some conflicting advice on how to best configure our SQL storage with our current SAN. I would like to do some of my own performance testing with a few different configurations. I looked at using SQLIOSim but it doesn't seem to simulate TempDB. Can anyone recommend a way to test data, log and TempDB performance? What about using a SQL profiler trace file from our production system? How would I use This to run against my test server? Thanks, Matt

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• How can I see logs in a server after a kernel panic hang ?

  - by Low Kian Seong

  I am running a production gentoo Linux machine, and recently there was a situation where the server hung in my co-located premises and when I got there I noticed that the server was hung on what appeared to be a kernel panic hang. I rebooted the machine with a hard reboot and was disappointed to find out that I could not find a shred of evidence anywhere on why the machine hung. Is it true that when I do a hard reboot the messages itself will get lost or is there a setting I can do somewhere say in syslog-ng or maybe in sysctl to at least preserve the error log so that I can prevent such mishaps from happening in the future ? I am running a 2.6.x kernel by the way. Thanks in advance.

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• Plugin 'InnoDB' registration as a STORAGE ENGINE failed. On win 7

  - by NimChimpsky

  I have had to reinstall MySQL, however the service is failing to start with the above cause listed in evnt viewer. One solution is apparently to delete a couple of files prefixed with 'ib_logfile' which represent any old databases. However I do not have these files, and my service is still failing to start ... ? When I say I don't have these files I did a search using the windows search with zero results, and they are definitely not present in my mysql install directory. And I don't have the "documents and setting/appilcation data' folder referenced in link. In fact I only have only one mysql install directory, I know where that is - what do I need to delete/change ? The instance is configured OK, I ran that as administrator and it is listed in services, but the service itself fails to start Any tips, other than going over to postgresql ?

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• Instant database snapshot

  - by raj

  My product uses oracle 9 database in its backend. every week the new release of the product is launched which will want to fire some DML, DDL queries to the database. I usually test the product release in a dummy database before applying it in the main database. I create a database dump using exp command, then import them into dummy database using imp. then i test the product in the dummy database and checks if there are any errors. This exp and imp takes about 3 hours to complete. Is there any alternative as : instant snapshot of the live database (which will be independent of the live one)? or is there any option to keep dummydatabase in sync with the originl database always. Yhis can be done by making the product firing DML&DDL queries to both the databases.. but this will be a HUGE performance problem.. how can i overcome this?

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• OpenX : mySql VS PostgreSQL

  - by Andreas Grech

  I have been using OpenX's AdServer with mySql as a backend, and since OpenX allows one to choose between mysql and postgres, I was wondering if anyone ever used Postgres and wished to talk about their experience with it here. Also, is there anyone who maybe tried using OpenX with both and can offer a comparison between the databases ? I am asking this question because I was having some trouble recently with mySql because some tables crashed occasionally and proved problematic because of the overhead they generated; and as a consequence of this, Statistics where not being generated.

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• Unknown MySQL server host - connection problem

  - by Zukas

  I am new to databases and I have been asked to look at a few tables and see how many records they have and some other information. I cannot access phpMyAdmin through cPanel, which is how I've always done it on my own server. I decided to download MySQL Workbench. I enter in all the information is asks: Hostname: mysite.startlogicmysql.com Port: 3306 Username: user. I press connect and get this Unknown MySQL server host 'mysite.startlogicmysql.com' (11004) Am I using the wrong hostname? I've seen a server name, a hostname in the server variables list which is something like custsql.eigbox.net and the server itself is custsql.eigbox.net In both cases the custsql is a little different than what I posted. I am not sure which one to use. If there is anything else anyone needs to know I can tell you. Tanks.

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• Are SANs unreliable?

  - by chaos

  So at the place where I wear one of my various hats, this one representing a development rather than admin role, there's been an initiative to move to SANs. So far, I have been spectacularly unimpressed. First it was this behavior where, when MySQL databases are on the SAN, the first few tables that anything tries to hit after the system boots come up as nonexistent and MySQL has to be restarted before it realizes they're actually there. Then today, on multiple systems (including the primary SVN repository, ever-so-wonderfully) we get SAN mounts spewing IO errors and the filesystems going into read-only, which is the kind of behavior I expect from directly mounted naked disks, not fault-tolerant managed storage. Right now, I'm at the point where if I were putting together a project and somebody said "hey we should use SANs", my response would be "GTFO". So basically I want to know whether my experience is typical or even common, or whether I'm having some kind of freakishly bad luck with SANs. The systems these SANs are attached to are all CentOS machines, if that's relevant.

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• Debian Lenny - network interfaces(eth) are in DOWN state

  - by pachanga

  Folks, I'm facing a very weird problem with one of my production servers(it's Debian Lenny) - after reboot network interfaces(eth0,eth1) are in DOWN state. Looks like an Intel based networking adapter is installed on the server, lspci lists it as follows: Ethernet controller: Intel Corporation Device 10c9 (rev 01) The kernel driver responsible for this adapter is "igb". I tried "modprobe -r igb && modprobe igb", network interfaces first disappear then appear, but they are in DOWN state again. What could go wrong? It used to be working just fine. How can this be fixed?

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• How to proceed setting up a secondary mysql linux slave?

  - by Algorist

  I have a mysql database master and slave in production. I want to setup additional mysql slave. There is around 15 Terabyte of data in the database and there are MYISAM and InnoDB tables in the database. I am thinking of below options: Shutdown master database and copy the mysql data folder to secondary slave. Can Innodb tables be copied like this? Run flush table with read lock, scp the file to new slave and unlock the table and this is possible for myisam tables, can I do the same for innodb tables too? Thanks for looking at the question.

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