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:
creating a USB install disk is super easy now.
1. Download the Mavericks installer
2. it should be located
/Applications/Install\ OS\ X\ Mavericks.app
3. Open up terminal and navigate into the Resources section of the app
/Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources
4. Run the following command:
sudo ./createinstallmedia --volume /Volumes/ToFormat --applicationpath /Applications/Install\ OS\ X\ Mavericks.app
* 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 newegg.com
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:
- Download rember and put it on the root of your HD
- Start up in single user boot mode (hold down Command-S)
- Navigate to rember (/Rember.app/Contents/Resources)
- Execute memtest with default settings (./memtest)
After removing my 8GB RAM and reinstalling my 2GB standard RAM, it seems to become more stable.
Just released today. my friend, mr. croata hooked it up.
so much for productivity…