Lion, RAM, Spotlight & Hazel

Hi folks,
I'm trying to get to the bottom of a recurring crash on my system. Specs:
• macbook mid-2007
• 10.7.2
• 3GB RAM (= max. possible)
• 320GB HDD
Hazel is one of many possible (or so it seems to my geek-challenged mind) contributors. Every few days my system crashes (black screen, unresponsive to any input activity). After safe boot & restart Spotlight rebuilds its index, taking about 2 hours and a lot of resources. I mention Hazel because I note that hazelfolderwatch seems to spike the CPU quite often.
I'm aware that my RAM is 1GB less than what Apple says is ideal for Lion (though 1GB above the minimum required). I'm also aware that reports vary widely on Lion's performance on systems the age of mine - with or without Spotlight enabled, and with varied amounts of RAM.
How likely is it that an app like Hazel which interacts with Spotlight a fair bit could be causing my RAM to be overstretched, and thus crashing the system?
Thanks.
I'm trying to get to the bottom of a recurring crash on my system. Specs:
• macbook mid-2007
• 10.7.2
• 3GB RAM (= max. possible)
• 320GB HDD
Hazel is one of many possible (or so it seems to my geek-challenged mind) contributors. Every few days my system crashes (black screen, unresponsive to any input activity). After safe boot & restart Spotlight rebuilds its index, taking about 2 hours and a lot of resources. I mention Hazel because I note that hazelfolderwatch seems to spike the CPU quite often.
I'm aware that my RAM is 1GB less than what Apple says is ideal for Lion (though 1GB above the minimum required). I'm also aware that reports vary widely on Lion's performance on systems the age of mine - with or without Spotlight enabled, and with varied amounts of RAM.
How likely is it that an app like Hazel which interacts with Spotlight a fair bit could be causing my RAM to be overstretched, and thus crashing the system?
Thanks.