Fix memory errors in Docker 1.2.0

[jbonhag]

Seems like DB2 is running out of memory, even while running in privileged mode and with shmmax set.

IBM sez:

At a minimum, a DB2 database system requires 256 MB of RAM. For a system running just a DB2 product and the DB2 GUI tools, a minimum of 512 MB of RAM is required. However, 1 GB of RAM is recommended for improved performance. These requirements do not include any additional memory requirements for other software that is running on your system.
When determining memory requirements, be aware of the following:
DB2 products that run on HP-UX Version 11i for Itanium-based systems require 512 MB of RAM at a minimum.

For IBM® data server client support, these memory requirements are for a base of five concurrent client connections. You will need an additional 16 MB of RAM per five client connections.
Memory requirements are affected by the size and complexity of your database system, and the extent of database activity and the number of clients accessing your system.

For DB2 server products, the self-tuning memory feature simplifies the task of memory configuration by automatically setting values for several memory configuration parameters. When enabled, the memory tuner dynamically distributes available memory resources among several memory consumers including sort, the package cache, the lock list and buffer pools.
DB2 requires paging, also called swap to be enabled. This configuration is required to support various functions in DB2 which monitor or depend on knowledge of swap/paging space utilization. The actual amount of swap/paging space required varies across systems and is not solely based on memory utilization by application software. It is only strictly required by DB2 on the Solaris and HP platforms due to their use of early paging space allocation.

A reasonable minimum swap/paging space configuration for most systems is 25-50% of RAM. Solaris and HP systems with many small databases or multiple databases tuned by STMM might require a paging space configuration of 1 x RAM or higher. These higher requirements are due to virtual memory pre-allocated per database / instance, and retained virtual memory in the case of STMM tuning multiple databases. Additional swap/paging space might be wanted to provision for unanticipated memory overcommitment on a system.

[jbonhag]

Here's a dump of the error (sent from inside a Ubuntu 14.04 container):

https://gist.github.com/anonymous/b693cd719fb276c3fde5

[jbonhag]

This is really a duplicate of #2 .