#At lp:maria based on revid:knielsen@knielsen-hq.org-20090916120716-ssmx93bg4znld9l8 2743 Igor Babaev 2009-09-16 Fix of bug #417751 by Yasufumi Kinoshita. modified: storage/xtradb/srv/srv0start.c === modified file 'storage/xtradb/srv/srv0start.c' --- a/storage/xtradb/srv/srv0start.c 2009-09-03 13:20:22 +0000 +++ b/storage/xtradb/srv/srv0start.c 2009-09-16 17:43:01 +0000 @@ -1119,8 +1119,14 @@ innobase_start_or_create_for_mysql(void) os_aio_use_native_aio = FALSE; } else { - /* On Win 2000 and XP use async i/o */ - os_aio_use_native_aio = TRUE; + /* On Win 2000 and XP currently native async i/o + is not used for xtradb by default */ + //os_aio_use_native_aio = TRUE; + os_aio_use_native_aio = FALSE; + fprintf(stderr, + "InnoDB: Windows native async i/o is disabled as default.\n" + "InnoDB: It is not applicable for the current" + " multi io threads implementation.\n"); } #endif if (srv_file_flush_method_str == NULL) { @@ -1156,6 +1162,12 @@ innobase_start_or_create_for_mysql(void) } else if (0 == ut_strcmp(srv_file_flush_method_str, "async_unbuffered")) { srv_win_file_flush_method = SRV_WIN_IO_UNBUFFERED; + os_aio_use_native_aio = TRUE; + srv_n_read_io_threads = srv_n_write_io_threads = 1; + fprintf(stderr, + "InnoDB: 'async_unbuffered' was detected as innodb_flush_method.\n" + "InnoDB: Windows native async i/o is enabled.\n" + "InnoDB: And io threads are restricted.\n"); #endif } else { fprintf(stderr,