Translations:General FAQ/47/en
From LimeSurvey Manual
In case your survey contains too many questions, you can define a different block size in PostgreSQL to create more columns. This might be tricky because you have to recompile PostgreSQL and set BLCKSZ to a higher value, like 16kiB or 32kiB. Watch for the configuration option "--with-blocksize=BLOCKSIZE". For details see the archives of the PostgreSQL mailing list or ask there (pgsql-patches(at)postgresql(dot)org).