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Event ID 17890 (A significant part... paged out.) with SQL Server 2008

- by Godeke

I have a machine that has SQL Server 2008 Standard installed. Periodically (about once an hour) I am getting Event ID 17890 several times in a row. An example: 6:28:54 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 0 seconds. Working set (KB): 10652, committed (KB): 628428, memory utilization: 1%%. 6:34:27 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 332 seconds. Working set (KB): 169780, committed (KB): 546124, memory utilization: 31%%." 6:38:55 "A significant part of sql server process memory has been paged out. This may result in a performance degradation. Duration: 600 seconds. Working set (KB): 245068, committed (KB): 546124, memory utilization: 44%%." This pattern repeated at 7:26 - 7:37, 8:26 - 8:36, 9:24 - 9:35 and so with the same increasing working set and memory utilization pattern. I don't have any (known) background tasks running at this time. Backups run at 2:00 This subsided from 11:00 at night until it resumed at 4:00 in the morning and has been continuing the intermittent 10 minute glitch periods. As this server has plenty of RAM (the commit charge has peaked at 2,871,564 of 4,194,012 physical) I disabled the paging files after reading several items I dug up searching Google and not finding any of them changing the situation. This pattern I am documented is after removing the paging files, so I'm not even sure where we are paging the SQL process could be going. I also changed the SQL process memory to have a minimum of 500MB and a maximum of 2GB of RAM (as this is a light duty database server serving only a small workgroup). Has anyone encountered this? Prior to disabling the page files this error would cause 5 minutes of disk thrashing that disabled access to the databases, files, IIS webs and so on. Since disabling the page files it just logs strange things, but I'm not seeing a performance drop at least. Any suggestions would be welcome.

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Is it possible to tunnel ICMP over TCP?

- by Robert Atkins

I don't want to tunnel TCP over ICMP (as ptunnel does), I want to go the other way around. I'm in the situation where I have TCP (HTTP) connectivity to a machine but an internal firewall over which I have no control is swallowing pings. The monitoring software I'm using appears to determine connectivity by attempting to send a ping before it tries to just connect to the web service on the target machine. It's failing this ping test and giving up. I believe if I could fool my monitoring software into thinking pings were getting through, it would then connect to the web service and be on its merry way. Anyone know how I can do this? I have SSH and root access on the destination machine.

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What benefit do I get from using a 64-bit server?

- by blockhead

I bought a small 256MB slice from slicehost and installed Ubuntu 10.04 64bit and wordpress on it. Performance was dismal as apache was eating up all my memory. Once I did some taming of apache and switched to fCGI things ran fine. Next I rebuilt as a 32 bit server, and performance was much better. What benefit would I get from a 64 bit server. Is it all about the memory?

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perfmon reporting higher IOPs than possible?

- by BlueToast

We created a monitoring report for IOPs on performance counters using Disk reads/sec and Disk writes/sec on four servers (physical boxes, no virtualization) that have 4x 15k 146GB SAS drives in RAID10 per server, set to check and record data every 1 second, and logged for 24 hours before stopping reports. These are the results we got: Server1 Maximum disk reads/sec: 4249.437 Maximum disk writes/sec: 4178.946 Server2 Maximum disk reads/sec: 2550.140 Maximum disk writes/sec: 5177.821 Server3 Maximum disk reads/sec: 1903.300 Maximum disk writes/sec: 5299.036 Server4 Maximum disk reads/sec: 8453.572 Maximum disk writes/sec: 11584.653 The average disk reads and writes per second were generally low. I.e. for one particular server it was like average 33 writes/sec, but when monitoring in real-time it would often spike up to several hundreds and also sometimes into the thousands. Could someone explain to me why these numbers are significantly higher than theoretical calculations assuming each drive can do 180 IOPs? Additional details (RAID card): HP Smart Array P410i, Total cache size of 1GB, Write cache is disabled, Array accelerator cache ratio is 25% read and 75% write

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WiFi signal is lost every 3 minutes

- by Software Monkey

For several weeks now my Android phone has been losing it's WiFi signal momentarily, typically at about 3 minute intervals (about 3 minutes, 1.5 seconds) and occasionally at some longer interval that always seems to be just over 3 minutes. This causes an interruption of several seconds while the WiFi connection is re-established and typically fails any kind of download/streaming that is happening, makes web sites "unreachable" and generally makes the phone unusable as a data device due to the frequency. The signal remains down for about a second, but the phone takes a few more seconds to reconnect to the router. This happens regardless of proximity to the router, which otherwise show a very strong signal - usually -40 to -30 dBm or better in the same room, nowhere less than 060 dBm anywhere in the house. Changing channels does not help (I've tried 1, 4, 8 and 9). Nor does turning off the router's guest access. Nor does turning off the 5.0 GHz band. Monitoring the signal on my phone with WiFi analyzer, shows all WiFi signals on all channels drop to nothing when the WiFi connection is lost (there are two other networks on different channels which are strong enough to be relevant, with about 6 others constantly fading in and out). WiFi analyzer shows 3 separate signals for my router, the main 2.4 GHz, the guest 2.4 GHz and the 5.0 GHz. Using WiFi Analyzer on my wife's phone side-by-side shows no change in signal when my phone drops, nor does her phone drop. Monitoring the signal using our laptop, side-by-side likewise shows no signal loss and likewise the laptop does not lose it's WiFi connection. But, at work, the phone seems to not exhibit the same behavior, or, if it does, it's very occasional. Monitoring it all day at work I only saw the signal drop 3 or 4 times. The signal strength of the various networks there is comparatively weak. AT&T were super helpful: "Sorry, we can't help you with WiFi problems. You could try doing a factory reset on your phone". </sarcasm The router is relatively new, but has been working fine with this phone since last Dec. Phone : Motorola Atrix (about 8 months old). Router : Belkin N750 DB (F9K1103 v1 (01C)). Router Firmware: 1.00.46 (2011/10/28 6:37:11). Security : WPA/WPA2-Personal (PSK)

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MMS gets hostname from uname and can't connect to it

- by Adam Monsen

I'm trying to get 10gen's MongoDB Monitoring Service monitoring my 3-node replica set. The replica set running in an AWS VPC. Each node runs on a different [virtual] machine. Assume their IPs are 192.168.1.1 (primary or secondary), 192.168.1.2 (primary or secondary), 192.168.1.3 (arbiter). From a quick look at the source, MMS appears to get the hostname of the machine it is running on like so: platform.uname()[1] For my VPC EC2 instance, this returns something like ip-192-168-1-1 MMS then tries to connect to this hostname, which does not resolve. I'd rather just use IP addresses (since they're always static), but it seems like the hardcoded use of platform.uname()[1] in mmsAgent.py precludes that. So, what's an elegant way out of this? Hack /etc/hosts? I'm not setting up a DNS server just for this. Maybe I'm just misunderstanding how to configure MMS.

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Free / Cached / Available memory on Linux

- by pkoraca

I have read that linux uses free memory for caching, to make system faster. However, both Nagios and Paessler PRTG monitoring system show me that my memory usage is critical. I could change Nagios mem_usage script to sum free and cached memory, but would that be correct information? I doubt that they misunderstood Linux memory usage. Lets say I have 8 GB RAM. 5 GB are used, 2 GB is cached, and I have 1 GB of free memory. Real available memory should be free+cached (3 GB)? If some new application would need additional 3 GB RAM, could it take everything from cache and free without using swap, or is there a minimum that should be in cache? Real example: $ cat /proc/meminfo MemTotal: 5984256 kB MemFree: 137052 kB Buffers: 140484 kB Cached: 3439616 kB SwapCached: 244 kB Active: 3148824 kB Inactive: 2341768 kB ... My monitoring tools show that I have 137 MB free RAM, however I have ~3,5 GB in Cache. Thanks!

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PowerShell script halts execution when Windows XP PC is locked

- by jshin47

I have the following script that does a continuous ping and reports failures. It works fine, except the loop apparently "suspends" when the computer is locked. I have confirmed this by starting the script, immediately locking the PC, waiting 10 minutes, and seeing how many pings have occurred. It is nowhere near the expected number. What could be the culprit? Write-Host "Entering monitoring loop..." -Background DarkRed $ping = new-object System.Net.NetworkInformation.Ping $count_up = 0 $count_dn = 0 $count_dd = 0 while ($true) { $result = $ping.send("10.1.1.1") if ($result.Status -eq "Success") { $count_up++ $count_dd = 0 } else { $count_dn++ $count_dd++ $this_date = Get-Date Write-Host "VPN ping failed at time " $this_date -Background Magenta if ($count_dd -gt 3) { Write-Host "***VPN is Down***" `a send_mail_notification("VPN is Down", "") } } if ($Host.UI.RawUI.KeyAvailable -and ("q" -eq $Host.UI.RawUI.ReadKey("IncludeKeyUp,NoEcho").Character)) { Write-Host "Exiting monitoring loop..." -Background DarkRed break; } Start-Sleep -m 250 } $total = $count_up + $count_dn $uptime = 100 * $count_up / $total Write-Host $count_up " out of " $total " pings for a " $uptime "% uptime."

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good PCI-e Wireless card for Windows7?

- by benwebdev

Hi I've just build a 64bit Windows 7 PC but am unhappy with the piddly performance of the linksys USB wireless dingle I've used. Can anyone suggest a good PCIe alternative that will be stronger for connection and maybe faster. I dont see why my desktop should show a weaker performance on wireless than my laptop when its sat next to it or even my Palm Pre for that matter. any thoughts? UK based max around £60ish. thanks, Ben

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How to bring Paging File usage metric to zero?

- by AngryHacker

I am trying to tune a SQL Server. Per Brent Ozar's Performance Tuning Video, he says the PerfMon's Paging File:%Usage should be zero or ridiculously close to it. The average metric on my box is around 1.341% The box has 18 GB of RAM, the SQL Server is off, the Commit Charge Total is 1GB and yet the PerfMon metric is not 0. The Performance of the Task Manager states that PF Usage is 1.23GB. What should I do to better tune the box?

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software to monitor internet usage on an XP PC? (browser + non-browser)

- by user39316

Hi Is there any (ideally open source) software for Windows that can be used on a PC, to monitor the usage of internet from that PC? It would need to include both browser and non-browser sources (e.g. a service that sync's calendar to gmail). So any software on your PC that uses would need to be configured to point to this local internet monitoring software/proxy. The monitoring software/proxy then would be configured to point to the company proxy server (address, port & credentials). Things that come to mind that might be close but not really focused on solving this might be perhaps: Charles Proxy, Fiddler 2, SQUID? The idea would be it could give you a daily/weekly/monthly report of internet upload/download usage on a per program/process/service basis for the PC it is being run on. thanks

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Free space on SSD (over provisioning) per disk or per partition?

- by Horst Walter

It is recommended to keep some percentage of an SSD free for relocation ( Is free space required on a SSD for performance? ). However, is this rule meant per partition or per disk (whole SSD)? So, if I want to keep 20% free for performance reasons, is it acceptable if one partition is 95% filled, while another is almost empty and the overall empty disk space still is 20. Or does each partition has to fulfill the rule of 20% empty space?

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gzip compression good or bad?

- by WarDoGG

I have a server that currently does a lot of processing in my application and the target users are those who have a very good internet connection. The output that is sent from the server is always text/html and we do not use any media (audio/video) only images (static site images like logo,etc). We are experiencing severe performance issues and I wonder if turning off gzip/mod_deflate on the server so that the server would avoid compressing the output. Will this cause an improvement in performance?

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Is a 1TB drive too big for a boot drive?

- by CT

Can the drive you choose to boot off affect performance? Would I receive faster boot/shutdown times if I were to choose a smaller drive? How would partitions affect performance/boot speed? Assuming all drives are the same RPM, lets say 7200.

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Will the VMs on the ESXi cluster be running after disconnection from the network?

- by John

What will happen if I disconnect the ESXi cluster configured with HA from the switch(I need to change the power source on the main switch) and there is no management port redundancy? I'm going to disable the host monitoring and VM monitoring within HA settings, and connect to the switch after it boots up. Will the virtual machines be running if I disconnect the hosts from the network so they will not see any other ESXi host? I hope everything will work fine and the hosts will join the cluster after they connect to the network again, but I would like to be sure ..

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How to enable WordPress to have multiple sites without a re-direct

- by user57039

I'm using WordPress to manage my site and when the site does a re-direct, it slows down performance. For example, WordPress allows you a single default site, www.mycompany.com. If a user goes to mycompany.com, WP will re-direct it www.mycompany.com. Is there a way to configure WP so that it will listen on both www.mycompany.com and mycompany.com without redirects. The redirects are causing performance hits to the site.

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Total network data sent/received of a non-daemon Linux process?

- by leden

I'm looking for a simple and effective way of measuring total bytes received/sent from a single process upon its termination. Basically, I am looking for a tool which has the interface similar to "time" and "/usr/bin/time", e.g. measure-net-data <prog_to_run> <prog_args> Received (b): XYZ Sent (b): ABC I know that there are many tools for bandwidth/network monitoring, but as far I can tell all of them are performing the measurements it real-time, which is inappropriate not only because of overhead but also because of the inconvenience - I would need to stop the program, capture the output of the tool and then kill it. I have seen that newer versions of Linux 2.6.20+ provide /proc/<pid>/io/ which contain the information I'm looking for; however, everything under /proc/<pid> when the process terminates, so I'm again back to the same problem as with any network monitoring tool.

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can a python script know that another instance of the same script is running... and then talk to it?

- by Justin Grant

I'd like to prevent multiple instances of the same long-running python command-line script from running at the same time, and I'd like the new instance to be able to send data to the original insance before the new instance commits suicide. How can I do this in a cross-platform way? Specifically, I'd like to enable the following behavior: "foo.py" is launched from the command line, and it will stay running for a long time-- days or weeks until the machine is rebooted or the parent process kills it. every few minutes the same script is launched again, but with different command-line parameters when launched, the script should see if any other instances are running. if other instances are running, then instance #2 should send its command-line parameters to instance #1, and then instance #2 should exit. instance #1, if it receives command-line parameters from another script, should spin up a new thread and (using the command-line parameters sent in the step above) start performing the work that instance #2 was going to perform. So I'm looking for two things: how can a python program know another instance of itself is running, and then how can one python command-line program communicate with another? Making this more complicated, the same script needs to run on both Windows and Linux, so ideally the solution would use only the Python standard library and not any OS-specific calls. Although if I need to have a Windows codepath and an *nix codepath (and a big if statement in my code to choose one or the other), that's OK if a "same code" solution isn't possible. I realize I could probably work out a file-based approach (e.g. instance #1 watches a directory for changes and each instance drops a file into that directory when it wants to do work) but I'm a little concerned about cleaning up those files after a non-graceful machine shutdown. I'd ideally be able to use an in-memory solution. But again I'm flexible, if a persistent-file-based approach is the only way to do it, I'm open to that option. More details: I'm trying to do this because our servers are using a monitoring tool which supports running python scripts to collect monitoring data (e.g. results of a database query or web service call) which the monitoring tool then indexes for later use. Some of these scripts are very expensive to start up but cheap to run after startup (e.g. making a DB connection vs. running a query). So we've chosen to keep them running in an infinite loop until the parent process kills them. This works great, but on larger servers 100 instances of the same script may be running, even if they're only gathering data every 20 minutes each. This wreaks havoc with RAM, DB connection limits, etc. We want to switch from 100 processes with 1 thread to one process with 100 threads, each executing the work that, previously, one script was doing. But changing how the scripts are invoked by the monitoring tool is not possible. We need to keep invocation the same (launch a process with different command-line parameters) but but change the scripts to recognize that another one is active, and have the "new" script send its work instructions (from the command line params) over to the "old" script.

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Unofficial Prep guide for TS: Microsoft Lync Server 2010, Configuring (70-664)

- by Enrique Lima

Managing Users and Client Access (20 percent) Objective Materials Configure user accounts http://technet.microsoft.com/en-us/library/gg182543.aspx Deploy and maintain clients http://technet.microsoft.com/en-us/library/gg412773.aspx Configure conferencing policies http://technet.microsoft.com/en-us/library/gg182561.aspx Configure IM policies http://technet.microsoft.com/en-us/library/gg182558.aspx Deploy and maintain Lync Server 2010 devices http://technet.microsoft.com/en-us/library/gg412773.aspx Resolve client access issues http://technet.microsoft.com/en-us/library/gg398307.aspx Configuring a Lync Server 2010 Topology (21 percent) Objective Materials Prepare to deploy a topology http://technet.microsoft.com/en-us/library/gg398630.aspx Configure Lync Server 2010 by using Topology Builder http://technet.microsoft.com/en-us/library/gg398420.aspx Configure role-based access control in Lync Server 2010 http://technet.microsoft.com/en-us/library/gg412794.aspx http://technet.microsoft.com/en-us/library/gg425917.aspx Configure a location information server http://technet.microsoft.com/en-us/library/gg398390.aspx Configure server pools for load balancing http://technet.microsoft.com/en-us/library/gg398827.aspx Configuring Enterprise Voice (19 percent) Objective Materials Configure voice policies http://technet.microsoft.com/en-us/library/gg398450.aspx Configure dial plans http://technet.microsoft.com/en-us/library/gg398922.aspx Manage routing http://technet.microsoft.com/en-us/library/gg425890.aspx http://technet.microsoft.com/en-us/library/gg182596.aspx Configure Microsoft Exchange Unified Messaging integration http://technet.microsoft.com/en-us/library/gg398768.aspx Configure dial-in conferencing http://technet.microsoft.com/en-us/library/gg398600.aspx Configure call admission control http://technet.microsoft.com/en-us/library/gg520942.aspx Configure Response Group Services (RGS) http://technet.microsoft.com/en-us/library/gg398584.aspx Configure Call Park and Unassigned Number http://technet.microsoft.com/en-us/library/gg399014.aspx http://technet.microsoft.com/en-us/library/gg425944.aspx Manage a Mediation Server pool and PSTN Gateway http://technet.microsoft.com/en-us/library/gg412780.aspx Configuring Lync Server 2010 for External Access (19 percent) Objective Materials Configure Edge Services http://technet.microsoft.com/en-us/library/gg398918.aspx Configure a firewall http://technet.microsoft.com/en-us/library/gg425882.aspx Configure a reverse proxy http://technet.microsoft.com/en-us/library/gg425779.aspx Monitoring and Maintaining Lync Server 2010 (21 percent) Objective Materials Back up and restore Lync Server 2010 http://technet.microsoft.com/en-us/library/gg412771.aspx Configure monitoring and archiving http://technet.microsoft.com/en-us/library/gg398199.aspx http://technet.microsoft.com/en-us/library/gg398507.aspx http://technet.microsoft.com/en-us/library/gg520950.aspx http://technet.microsoft.com/en-us/library/gg520990.aspx Implement troubleshooting tools http://technet.microsoft.com/en-us/library/gg425800.aspx Use PowerShell to test Lync Server 2010 http://technet.microsoft.com/en-us/library/gg398474.aspx

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Oracle Enterprise Manager content at Collaborate 12 - the only user-driven and user-run Oracle conference

- by Anand Akela

From April 22-26, 2012, Oracle takes Las Vegas. Thousands of Oracle professionals will descend upon the Mandalay Bay Convention Center for a weeks worth of education sessions, networking opportunities and more, at the only user-driven and user-run Oracle conference - COLLABORATE 12. This is one of the best opportunities for you to learn more about Oracle technology including Oracle Enterprise Manager. Here is a summary of an impressive line-up of Oracle Enterprise Manager related content at COLLABORATE 12. Customer Presentations Stability in Real World with SQL Plan Management Upgrading to Oracle Enterprise Manager 12c - Best Practices Making OEM Sing and Dance with EMCLI Oracle Real Application Testing: A look under the hood Optimizing Oracle E-Business Suite on Exadata Experiences with OracleVM 3 and Grid Control in an Oracle BIEE environment. Right Cloud-- How to Avoid the False Cloud by using Oracle Technologies Forgetting something? Standarize your database monitoring environment with Enterprise Manager 11g Implementing E-Business Suite R12 in a Federal Cloud - Lessons Learned Cloud Computing Boot Camp: New DBA Features in Oracle Enterprise Manager Cloud Control 12c Oracle Enterprise Manager 12c, Whats Changed, Whats New? Monitoring a WebCenter Content Deployment with Enterprise Manager Enterprise Manager 12c Cloud Control: New Features and Best Practices (for IOUG registrants only) Oracle Presentations Roadmap Session: Total Cloud Control with Oracle Enterprise Manager 12c Real World Performance (complimentary for IOUG registrants only) Database-as-a-Service: Enterprise Cloud in Three Simple Steps Bullet-proof Your Enterprise, SOA & Cloud Investments Using Oracle Enterprise Gateway What’s New for Oracle WebLogic Management: Capabilities that Scripting Cannot Provide Exadata Boot Camp: Complete Oracle Exadata Management with Oracle Enterprise Manager Stay connected with Oracle Enterprise Manager : Twitter | Facebook | YouTube | Linkedin | Newsletter

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July, the 31 Days of SQL Server DMO’s – Day 3 (sys.dm_exec_connections)

- by Tamarick Hill

The third DMV we will review is the sys.dm_exec_connections DMV. This DMV is Server-Scoped and displays information about each and every current connection on your SQL Server Instance. Lets take a look at some information that this DMV returns. SELECT * FROM sys.dm_exec_connections After reviewing this DMV, in my opinion, its not a whole lot of useful information returned from this DMV from a monitoring or troubleshooting standpoint. The primary use case I have for this DMV is when I need to get a quick count of how many connections I have on one of my SQL Server boxes. For this purpose a quick SELECT COUNT(*) satisfies my need. However, for those who need it, there is other information such as what type of authentication a specific connection is using, network packet size, and client/local TCP ports being used. This information can come in handy for specific scenarios but you probably wont need it very much for your day to day monitoring/troubleshooting needs. However, this is still an important DMV that you should be aware of in the event that you need it. For more information on this DMV, please see the below Books Online link: http://msdn.microsoft.com/en-us/library/ms181509.aspx

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Keep Your Eye on the Ball

- by [email protected]

With the FIFA World Cup 2010 in South Africa almost a week underway, the soccer fans all around the World are talking about at least 2 things. That typical vuvuzela sound and the new Jabulani ball, saying it moves unpredictably, is difficult to handle and somehow the altitude of the World Cup stadiums also seem to be a contributing factor.(Picture taken from http://www.flickr.com/photos/warrenski/4143923059/ under a Creative Commons license)Although the FIFA states that it hasn't received any official complaints, the end users don't seem to be very happy with this new ball. This brings me to a comparison with IT management and testing. When you're in a situation where you're introducing a new product, in IT terms, introducing a new application, you would like to test all possible scenarios that your end users could be using and experiencing. However, that's a very time and resource intensive process to do for every application change or update. It's like getting ready for the big game but you have no game plan.That's why a new approach has been developed. One that's based on the 80/20 rule. Testing 80% of the application will cost about 20% of the efforts. The remaining 20% of your application will not be tested before deployment, but monitored with a real user monitoring solution immediately after deployment. These tools track all user experiences, including error messages and the performance and availability metrics from an end user perspective. Should any anomaly occur, you would be able to repair it quickly so you and your end users can get back into the game.These real user sessions can be easily converted into testing scripts, so the 80% of the application testing can be complimented with the remaining 20%.Oracle Enterprise Manager 11g group of products offers both the real user monitoring solution with Oracle Real User Experience Insight, as well as the required testing solution with Oracle Application Testing Suite. Visit our Oracle Enterprise Manager 11g resource center and find out how it's Business-Driven IT Management approach will help you keep your eye on your business ball.Happy World Cup.

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Troubleshooting EBS Discovery Issues - Part 2

- by Kenneth E.

Part 1 of “Troubleshooting EBS Discovery Issues”, which was posted on May 17th, focused on the diagnostics associated with the initial discovery of an EBS instances (e.g., Forms servers, APPL_TOPs, databases, etc.).Part 2 focuses on verifying parameters of the Change Management features, also called "Pack Diagnostics, specifically for Customization Manager, Patch Manager, Setup Manager, Automated Cloning, and User Monitoring. As stated in the first post, there can be numerous reasons that Discovery fails - credentials, file-level permissions, patch levels - just to name a few.The Discovery Wizard can be accessed from the EBS homepage. From the home page, click "Pack Diagnostics"Click "Create" to define the diagnostic processProvide the required inputs; Name, Module (i.e., Customization Manager, Patch Manager, Setup Manager, Automated Cloning, and User Monitoring), Show Details (typically "All"), and Category (typically check both Generic and User Specific). Add the appropriate targets.Once the diagnostic process has completed, view the results. Click on "Succeeded" or "Failed" in the Status column.Expand the entire tree and click on each "Succeeded/Failed" status to see the results of each test within that task.Sample output verifying o/s user name and required patches Additional sample output showing a failed testComplete descriptions of, as well as recommended corrective actions for, all of the diagnostic tests that are run in EM 12c is found in this spreadsheet. Additional information can be found in the Application Management Pack User Guide.

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New Packt Books: APEX & JRockit

- by [email protected]

I have received these 2 ebooks from Packt Publkishing and I am currently reviewing them. Both of them look great so far. Oracle Application Express 3.2 - The Essentials and More First of all, I have to mention that I am new to APEX. I was interested on this product which is a development tool for Web applications on the Oracle Database. As I support JDeveloper and ADF, which are products that work very closely with the Oracle Database and are a rapid development tool as well, it is always interesting and useful to know complementary tools. APEX looks very useful and the book includes many working examples. A more complete review of this book is coming soon. Further information about this book can be seen at Packt. Oracle JRockit: The Definitive Guide Many of our Oracle Coherence customers run their caches and clusters using JRockit. This JVM has helped us to solve lots of Service Requests. It is a really reliable, fast and stable JVM. It works great on both development and production environments with big amounts of data, concurrency, multi-threading and many other factors that can make a JVM crash. I must also mention JRockit Mission Control (JRMC), which is a great tool for management and monitoring. I really recommend it. As a matter of fact, some months ago, I created a document entitled "How to Monitor Coherence-Based Applications using JRockit Mission Control" (Doc Id 961617.1) on My Oracle Support. Also, the JRockit Runtime Analyzer (JRA) and it successor of newer versions, the JRockit Flight Recorder (JFR) are deeply reviewed. This book contains very clear and complete information about all this and more. I will post an entry with a more complete review soon (and will probably post an entry about Coherence monitoring with JRMC soon too). Further information about this book can be seen at Packt.

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DNS hijack - prevention tips

- by user578359

Hi there, Over the weekend it looks like the DNS was hijacked on two of my domains. My set up is I have the sites registered on 1and1.co.uk, with dns nameservers pointing to Hostgator in the US where the sites are hosted. I also had cloudflare CDN running on the sites (via hostgator cpanel). My question is any ideas as to how this happened, and how I could either monitor it so I know if it occurs again, or strengthen the set up/service to minimise the risk. History: I received a ping from my site monitoring service that the sites were down. When I checked the sites were up so I assumed it was local to the monitoring service I received a ping last night the sites were up When I checked, one site was redirecting to download-manual.com (and checking that URL now, the home page is not the same as the one I saw, so they too may have been hijacked/hacked) The other site URL remained the same but had one of those standard site search pages which bounce you off to either phishing or paid for search sites I notified Hostgator who told me Cloudflare or 1and1 were the issue. I removed cloudflare, and contacted both them and hostgator, and am awaiting a response, but am not holding my breath. Is this common? I've never heard of this or come across this before. It's pretty scary that this can happen so easily. Appreciate any input. **Update: I've now spoken to support at 1and1, Hostgator, and Cloudflare, and each one claims it has nothing to do with them, and must be one of the others. Larry, curly, moe.

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