Hello a) look on COPY statement and COPY API protocol - it can be 100x faster than INSERTS http://www.postgresql.org/docs/8.3/static/libpq-copy.html b) if you can't to use COPY use: * outer transaction - BEGIN, INSERT, INSERT ... COMMIT if this is possible * use a prepared statement http://www.postgresql.org/docs/8.3/static/sql-prepare.html if you cannot to use a outer transaction, and you can to replay a process, if there are some problems, use a asynchronnous commit http://www.postgresql.org/docs/8.3/static/wal-async-commit.html Regards Pavel Stehule 2011/7/7 sergio mayoral <smayoral@xxxxxxxxx>: > Hi, > i am using libpq library and postgresql 8.4 for my linux application running > on ARM with 256 MB. I am just doing: > PQconnectdb(); > PQexec(INSERT INTO table1 ....); (0.009661 sec.) > PQexec(INSERT INTO table1 ....); (0.004208 sec.) > PQexec(INSERT INTO table2 ....); (0.007352 sec.) > PQexec(INSERT INTO table2 ....); (0.002533 sec.) > PQexec(INSERT INTO table2 ....); (0.002281 sec.) > PQexec(INSERT INTO table2 ....); (0.002244 sec.) > PQexec(INSERT INTO table3 ....); (0.006903 sec.) > PQexec(INSERT INTO table3 ....); (0.002903 sec.) > PQfinnish(); > I check the time for each PQexec with gettimeofday function and I always see > that the first INSERT for each table needs longer than the next ones. > this must be something with the parser stage and since i am doing every time > the same queries, I would like to know if there is a way to cache this > queries in order to speed up the first INSERTs. > Thanks in advance, > Sergio -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
