How to reproduce BUG #6425 on Solaris Sparc
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* Set up two database servers with streaming replication between them.

* Untar these files on both.

* Create a user called pref_user and a database called preferences (or edit
  bench_loop.sh and import.sh to match an existing database.)

* Use schema.sql to create and populate the tables on the primary.

* Start the import loop on the primary by doing:

touch go
nohup ./import_loop.sh &

* Start the pgbench loop on the secondary by doing:

touch go
nohup ./bench_loop.sh &

* Wait for the secondary to crash. (Remember to set ulimit -c)


The problem only seems to occur when deadlocks occur during the import, and
this may only happen if more than one import is running at a time.
