Enable caching of schema.rbschema-cache

This is a lesser known Rails feature that removes the need for querying
various internal tables for schema details (e.g. column types) every
time Rails boots up.

This feature is described in http://iempire.ru/2016/12/13/schema-cache/
and was brought to our attention by @stanhu.

Since the schema cache is specific to the database we only enable this
on PostgreSQL.

1 files changed, 0 insertions, 0 deletions

diff --git a/db/schema_cache.dump b/db/schema_cache.dump
new file mode 100644
index 00000000000..197014c1471
--- /dev/null
+++ b/db/schema_cache.dump