I am running a somewhat unfamiliar Ruby automation results app using
ActiveRecord to manage the postgres 9.0 backend. During our automation runs we
sometimes get bursts of HTTP 500 errors coming back at us, and the Ruby app log
shows an Hstore::TooBig error:
Hstore::TooBig (Hstore::TooBig):
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:3045:in
`attributes_with_quotes'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:3036:in
`each'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:3036:in
`attributes_with_quotes'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:2934:in
`update_without_lock'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/locking/optimistic.rb:81:in
`update_without_dirty'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/dirty.rb:146:in
`update_without_timestamps'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/timestamp.rb:64:in
`update_without_callbacks'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/callbacks.rb:282:in
`update'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:2927:in
`create_or_update_without_callbacks'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/callbacks.rb:250:in
`create_or_update'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/base.rb:2594:in
`save_without_validation!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/validations.rb:1100:in
`save_without_dirty!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/dirty.rb:87:in
`save_without_transactions!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/transactions.rb:200:in
`save!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/connection_adapters/abstract/database_statements.rb:136:in
`transaction'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/transactions.rb:182:in
`transaction'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/transactions.rb:200:in
`save!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/transactions.rb:208:in
`rollback_active_record_state!'
vendor/bundle/ruby/1.8/gems/activerecord-2.3.12/lib/active_record/transactions.rb:200:in
`save!'
app/helpers/logger_helper.rb:72:in `update_testrun'
app/models/testrun.rb:267:in `transaction_with_isolation_level'
...
I don't quite know where this error is coming from. The ActiveRecord source
doesn't seem to have it, and I'm not familiar enough with Rails or ActiveRecord
to track definitively whether the failing function is actually performing a DB
operation. Moreso I cannot seem to find any mentions (post 9.0 at least) of
Hstore size limitations, either key/val pairs (which 8.x docs said was 65k) or
the hstore field in its entirety.
So to piece out the questions,
- is there a total size limitation of the hstore field? or is it theoretically
large enough (1GB) that it really shouldn't matter?
- is there a string size limitation of each key/val in 9.x, or is it still 65k
from 8.x?
- is Hstore::TooBig an error that is likely coming from postgres? or should I
continue poking at ActiveRecord or other places?
thanks,
~ john
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