Should we be overriding the default temp table size?
While working with ACLs today, I got this error message:
[nativecode=1114 ** The table 'civicrm_tmp_e_aclccache_67845b31b6526452bc0e37b6ce4c68fd' is full]
This temp table is set to use the MEMORY engine. Which makes sense - but then we can't create a table larger than MySQL's
max_heap_table_size, which by default is 16MB.
Now, we should ideally never show this error. We can take one of two approaches:
- We can override
max_heap_table_sizeon a per-MySQL session basis. With our centralized temp table creation, this should be easy.
- We can document this issue in the sysadmin guide, maybe under a "steps for large installations" page.
I'm inclined toward the first option - we should handle problems for sysadmins, not ask them to - but would like the input of folks who know MySQL better than me before I write a patch.
- Create an ACL for a user who can view a lot of contacts (in my case, ~127,000).
- As that user, search for contacts.