Log Message: ----------- Don't use O_DIRECT when writing WAL files if archiving or streaming is enabled. Bypassing the kernel cache is counter-productive in that case, because the archiver/walsender process will read from the WAL file soon after it's written, and if it's not cached the read will cause a physical read, eating I/O bandwidth available on the WAL drive. Also, walreceiver process does unaligned writes, so disable O_DIRECT in walreceiver process for that reason too. Modified Files: -------------- pgsql/src/backend/access/transam: xlog.c (r1.376 -> r1.377) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/xlog.c?r1=1.376&r2=1.377) pgsql/src/backend/replication: walreceiver.c (r1.4 -> r1.5) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/replication/walreceiver.c?r1=1.4&r2=1.5) pgsql/src/include/access: xlogdefs.h (r1.25 -> r1.26) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/access/xlogdefs.h?r1=1.25&r2=1.26) pgsql/src/include/replication: walreceiver.h (r1.6 -> r1.7) (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/replication/walreceiver.h?r1=1.6&r2=1.7)
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