All posts by seamus

3DS Will Not Power on even though it is charged — how to fix it (maybe)

My 3DS wouldn’t power on this morning. I hadn’t used it for a week. I guess the battery was as flat as a pancake. After charging the 3DS for an hour it still wouldn’t power on (it was still plugged into the mains and charging as far as I could tell).

Hmm. That’s a bit weird I thought. In a fit of desperation/pique I removed the game card (Mario Kart 7) and I removed the SD Card too. I immediately tried to power on the 3DS and bingo it came on first time. I powered it down again, put the SD card and game card back in and bingo, it powered up again.

Phew.

 

Seamus

The Bears Breeches

 

 

Fix Oracle Database Won’t start due to invalid parameter in spfile.

Hmmm. Your Oracle Database Won’t start due to invalid parameter in spfile.. hmm..

This is a quote from appsdba.comWhen using an SPFILE it is possible to get into the situation where the database won’t start due to an invalid parameter, and since the database won’t start it is not possible to fix the SPFILE.

I got into this situation this morning. Its very very frustrating but relatively straightforward to fix. Here goes.

Step 0: Check for a pfile equivalent of your spfile! If it exists then start the database using startup pfile=/path/to/pfile and issue a create spfile from pfile when the database starts and then restart your database. Bingo. Amend your spfile parameters at your leisure. If you haven’t got a pfile then read on..

Step 1: find your spfile. If you don’t know where this is you’re goose is already cooked. It usually lives in $ORACLE_HOME/dbs and is called spfile<ORACLE_SID>.ora though yours may have a different name. In my case the ORACLE_SID is TEST so my spfile is called spfileTEST.ora. 

Step 2: Back up your spfile (and pfiles too).

Step 3: Open a command prompt, navigate to the directory containing your spfile and type strings spfile_name > $ORACLE_HOME/dbs/temp_pfile.ora (this creates a pfile not an spfile!!). If the spfile file is in $ORACLE_HOME/dbs then rename the spfile to something you’ll remember…  IF the spfile is stored within ASM then login as the ASM owner, start asmcmd and use the cp command to copy the file to a directory your database/instance owner can read and run strings /path/to/spfile/spfile_name > $ORACLE_HOME/dbs/temp_pfile.ora.

Step 4: open temp_pfile.ora with a text editor and check its parameters. Tidy up incomplete entries and amend offending entries where appropriate. (I’d accidentally reduced one of the memory parameters from 24G to 2G preventing the instance from starting up).

Step 5: try starting up the database.. startup pfile=/path/to/file/temp_pfile.ora should do the trick. If the instance starts shut it down immediately (shutdown immediate should do the trick). If the instance doesn’t start then check your parameters and try again!

Step 6: rename temp_pfile.ora to init<ORACLE_SID>.ora. Mine is called initTEST.ora.

Step 7: startup the database again. once its started type create spfile from pfile and press enter.

Step 8: Restart the database. Your database should now start up but this time its using the newly created spfile.

Step 9: Take applause from your colleagues and count your lucky stars.

 

This document was typed rather hastily on a train on my way home. If you spot a mistake please let me know.

 

Enjoy,

Seamus

 

 

How To Change DNS Settings on your Mac

So, why woud you want to know How To Change the DNS Settings on your Mac? If you use wi-fi or even a wired connection chances are DHCP sorts out your DNS settings for you. Well, I’ve been having problems with my Mac and surprise surprise it uses DNS settings supplied by my router which in turn routes me to my ISPs DNS servers for name resolution. After a bit of testing the problem appeared to be my ISP’s Servers that were the problem and so, after rummaging around the world wide web of useful info for advice on what to do, I decided to use Google’s Public DNS Servers instead of my ISPs. Google’s Public Servers are at 8.8.8.8 and 8.8.4.4.

Here’s how I changed my settings:

 

Seamus

 

How to import Enterprise Manager Grid Control Data into Excel and Create Attractive Looking Graphs and Charts

It is really not difficult to import performance data from your Enterprise Manager Grid Control setup and produce some very nice looking graphs from the data stored within.

Here’s one I made earlier.

Custom Oracle Enterprise Manager Graph / Report produced using Excel
A nice 3D graph of Enterprise Manager repository data demonstrating how much nicer Excel’s graphs are than Oracle OEM’s

 

Here’s how to do it:

  1. The first step is to install ODAC. You must do this because in my experience, on a Windows XP PC, Microsoft’s ODBC for Oracle driver doesn’t appear to handle Oracle’s sysdate at all well. You can download ODAC (11.2 Release 4 (11.2.0.3.0)  in my case) from Oracle’s rather swish download pages.
  2. The next thing to do is create an entry for your repository database. Make sure you edit the tnsnames.ora that is part of the ODAC installation or this won’t work.
  3. Create an ODBC data source using the tnsnames entry you created in step 2.
  4. Fire up Excel.
  5. From the menu bar select Data / Import External Data / New Database Query
  6. Select the ODBC data source you created in step 3.
  7. Enter your username and password. Username will be sysman, see your admin people if you don’t know the password.
  8. The MS Query query wizard shop pop up. Expand the the first table that appears in the Available Tables and Columns list and add the first row only to Columns in your query (for me the table is AQ$_MGMT_ADMINMSG_BUS_G and the first column is MSGID).
  9. Keep clicking next until you reach Query Wizard – Finish and you’re asked what you want to do next.
  10. Select the middle option – View Data or Edit data in Microsoft Query and click finish.
  11. If all goes well you should a Microsoft Query window containing another a visual representation of the query you just created
  12. Click on the AQ$_MGMT_ADMINMSG_BUS_G table ( or which ever table you used in step 8 ) and press delete. The table should disappear from the screen.
  13. Click the SQL button (at the very top of the window) and paste your query into the the SQL box that opens up then click OK. (You can use the query builder features of Microsoft Query but,  to be honest, that can take a while. What i usually do is take my base query (click here to see it or download it here: sample_oemrep_query.sql) and paste that in). NOTE: this query returns daily summaries up until the day before today – the query won’t return any data for today.
  14. Change your parameters to suit and Save the query if you wish (Irecommend this).
  15. Then click the Return Data button (its at the top of the window to the immediate left of the SQL button). You should find yourself back in Excel territory.
  16.  Choose where you want to put the data and click ok. You should have a spreadsheet full of Enterprise Repository data.
  17. Create charts and graphs and pivot tables and pivot charts to your heart’s content.

Beware! There is a caveat:

Your date must be formatted as YYYY-MON-DD or MS Query will have a fit. Your query, if you’re going to query on dates must contain something like:

MGMT_METRICS_1DAY.ROLLUP_TIMESTAMP>TO_DATE('2012-JAN-01','YYYY-MON-DD')

or for the last 90 days worth of metrics data..

MGMT_METRICS_1DAY.ROLLUP_TIMESTAMP >= SYSDATE - 90

 

Leave a comment if this is any use to you.

Video (and amendments coming soon!).
Seamus.

An easier way to run dscacheutil -flushcache on your Mac (OS X Snow Leopard) to clear your dns cache

Don’t know about you but I am fed up with intermittent “Unable to connect..” messages when I’m browsing the web on my Mac. Its a real pain – my mac is the only device in my house (out of many devices) that seems to have problems connecting to the web.

I’m fed up with having to open a terminal and enter “dscacheutil -flushcache” to get browsing the web going again.

To begin with I got around this by creating a shell script called revive.sh which ran dscacheutil but i got bored having to open a terminal, navigate to the location of my shell script and enter ./revive.sh.

There had to be another way… and there is. I created an Automator App which runs dscacheutil. Now when I get one of those pesky “Unable to connect…” messages I double-click on my app (or an alias for the app) and I’m browsing the web again.

You can download the app here: flushdns.app

Seamus

Mac OS X Automator Adventures – an app that will speak a dictionary definition of a word

Here’s an Automator app that will speak the dictionary definition of a word.

To get going double-click the app and when prompted type in the word for which you would like to hear the definition spoken.

Its basic but i’m jusssst gettin’ to grips with Automator.

 

You can get the app here : speakingdictionary.app

Mac OS X Automator Adventures – an app that speaks one’s IP Address

I know, this is completely useless… unless you have a use for it, that is.

I was home alone and a little bit bored so i decided to play around with Mac OS X’s Automator. Stuck for something do i though it would be nice to have an app that would speak one’s Mac’s IP address out loud. I know, who’d have thought that computers would be used to speak? 🙂 Anyway, I’ve never used Automator before and was surprised how easy it was to use.

 

You can download the app here

 

 

Convert your AWS SSH keys to a format you can use with PuTTY

If you’ve had problems with trying to connect to your EC2 instance with PuTTY its probably because the format of the private key from the keypair you generate in, say, the AWS Management Console is not in a format that PuTTY understands.

 

Check out this article in the Amazon Web Services document repository if you haven’t already done so.. How to get PuTTy working with AWS.

 

Seamus.

When CUPS stops printing ~ lp: Too many active jobs

I got a nasty surprise this morning. I run a batch routine that generates a couple of thousand or so letters from E-Business Suite every night and then prints them – via CUPS –  to a series of networked printers. This has worked since the year dot. It has never let me down…. until that is, this morning when it let me down big style.

The first 500 letters were queued and then subsequently printed. The other 2500 were rejected by CUPS. (I should mention at this point that the letters are printed individually thus each letter generates a print job meaning 3000 or so print jobs should’ve been created and subsequently printed off).

After the first 500 letters went of to CUPS I started to see a message in my application log:

lp: Too many active jobs

I have never seen this message before. Well weird considering the number of print jobs that have gone through the system.

To cut a long story short the solution to my print problem was to change a parameter in cupsd.conf

By default CUPS will queue a maximum of 500 print jobs before rejecting further print requests. To quote directly from the CUPS manual :

The MaxJobs directive controls the maximum number of jobs that are kept in memory. Once the number of jobs reaches the limit, the oldest completed job is automatically purged from the system to make room for the new one. If all of the known jobs are still pending or active then the new job will be rejected.

Setting the maximum to 0 disables this functionality. The default setting is 500.

So I added MaxJobs 0 to my cupsd.conf file, restarted CUPS, did a fairly large scale test (about 1000 jobs sent) and all is well. I’ll update this post at some point as I’ve heard setting MaxJobs 0 can have unpleasant side effects in terms of Memory and CPU consumption.

 

Script to find Apache, Java, JRE, Forms version for Oracle E-Business Suite R12

It can be a real pain finding out what version of Apache, Java, Oracle forms etc E-Business Suite R12 is using. You can do it by hand but here’s a quicker way – with a handy script that Oracle provide. You can get it from My Oracle Support by searching for article ID 468311.1.


NB: You’ll still need to cross-reference the versions of forms and apps you find with the expected versions on My Oracle Support by looking at the readmes and what-not for each patch and/or patchset.


Still beats doing it all by hand though.