m2.2xlarge are High-Memory Double Extra Large instances.

    34.2 GB of memory
    13 EC2 Compute Units (4 virtual cores with 3.25 EC2 Compute Units each)
    850 GB of instance storage
    64-bit platform
    I/O Performance: High

Which means each application has 16MB of ram. Does chroot (or whatever jail mechanism they use) allow shared memory for standard libraries?