Hello, > If you manually set RPADDING 2 in trgm.h, then it will, but the > allocation probably should use LPADDING/RPADDING to get it right, rather > than assume the max values.
Yes you are right. For RPADDING = 2, the current formula is suitable but for RPADDING =1, a lot of extra space is allocated. IIUC, for each word the total number of trigrams is: (word_length + LPADDING + RPADDING - 2). Also the maximum number of words a string can have is: (slen +1)/2 (considering each word has length of 1) I think (slen + (slen + 1)/2 * (LPADDING + RPADDING - 3) + 1) allocates only the necessary memory for different values of RPADDING. Regards, Beena Emerson ----- -- Beena Emerson -- View this message in context: http://postgresql.nabble.com/pg-trgm-Memory-Allocation-logic-tp5841088p5841238.html Sent from the PostgreSQL - hackers mailing list archive at Nabble.com. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
