Lately I’ve been trying to run some load scripts that basically take data from mySQL and convert them to a Redis Luke Protocol. Part of the reason why I wrote it in Java was because the cached object needed to be Java serialized.

I ran into some issues while running some tests. It seems that my Eclipse memory heap was not big enough. Here are steps to increasing it.

1. Open Eclipse
2. Eclipse > Preferences > Java > Installed JREs


3. Select the current JRE
4. Select “Edit”
5. Modify the default JVM properties to something like:
-Xms512M -Xmx1024M


creating a USB install disk is super easy now.

1. Download the Mavericks installer
2. it should be located /Applications/Install\ OS\ X\
3. Open up terminal and navigate into the Resources section of the app
/Applications/Install\ OS\ X\
4. Run the following command:
sudo ./createinstallmedia --volume /Volumes/ToFormat --applicationpath /Applications/Install\ OS\ X\

* notice that we named our volume “ToFormat”, you must insert the name of the volume you want to reformat.
** there are some other instructions on the internet, which require you to search for the base system.dmg, but the issue with that method is that it does not automatically create a recovery hd partition, so that features like file vault are not available.

In June 2011, I upgraded my macbook pro (MacBook Pro 13″/15″/17″ Unibody with Core 2 Duo “Penryn” and 9400M G chipset (Mid 2009): max, 8GB), with 8GB of RAM. I bought the Corsair RAM (CMSA8GX3M2A1066C7) from

At first (running Snow Leopard OS X 10.6), it crashed every once in a while, but I figured that going to OS X Lion (10.7) would fix it. I was wrong. Lion seems to magnify all there is to these crashes. I would get the grey screen of death as well as applications randomly quitting. These issues seem to escalate as I kept updating from 10.7 to 10.7.2

As always, I thought it was the install of my Lion, as I had just updated on top of Snow Leopard, which on forums was said to be a bad practice.

Finally I got sick of my crashes and googled around and found this forum where they mentioned that it was Lion and its finicky-ness with bad memory. I had never thought that the memory would be the issue. here

So the forum member suggested running rember which is basically a os x wrapper over memtest

I started my system in single user boot mode and ran the test. Unfortunately the forum describes the wrong procedure to run the test, I’ve included it below:

  1. Download rember and put it on the root of your HD
  2. Start up in single user boot mode (hold down Command-S)
  3. Navigate to rember (/
  4. Execute memtest with default settings (./memtest)

After removing my 8GB RAM and reinstalling my 2GB standard RAM, it seems to become more stable.