Re: pg full text search very slow for Chinese characters

Jimmy Huang <jimmy_huang@live.com> writes:
> I tried pg_trgm and my own customized token parser https://github.com/huangjimmy/pg_cjk_parser

pg_trgm is going to be fairly useless for indexing text that's mostly
multibyte characters, since its unit of indexable data is just 3 bytes
(not characters).  I don't know of any comparable issue in the core
tsvector logic, though.  The numbers you're quoting do sound quite awful,
but I share Cory's suspicion that it's something about your setup rather
than an inherent Postgres issue.

            regards, tom lane