IBM op720服务器+suse linux + oracle10g死机问题

一台IBM OP720服务器（power5） 装了susu9 linux  & oracle 10g ，最近经常出现死机的情况（远程无法telnet ，本地显示器无任何显示。只能手工重启），重启后又可以正常使用了。系统日志如下：

Feb 20 18:19:22 linux -- MARK --
Feb 20 18:20:38 linux kernel: Assertion failed! qc->flags & ATA_QCFLAG_ACTIVE,drivers/scsi/libata-core.c,atapi_packet_task,line=3329
Feb 20 18:20:38 linux kernel: Assertion failed! qc->flags & ATA_QCFLAG_ACTIVE,drivers/scsi/libata-core.c,ata_qc_complete,line=2857
Feb 20 18:39:22 linux -- MARK --
Feb 20 18:59:01 linux /USR/SBIN/CRON[17885]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 20 19:19:23 linux -- MARK --
Feb 20 19:39:23 linux -- MARK --
Feb 20 19:59:01 linux /USR/SBIN/CRON[24341]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 20 20:19:23 linux -- MARK --
Feb 20 20:39:24 linux -- MARK --
Feb 20 20:59:01 linux /USR/SBIN/CRON[30815]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 20 21:19:24 linux -- MARK --
Feb 20 21:39:24 linux -- MARK --
Feb 20 21:59:01 linux /USR/SBIN/CRON[4806]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 20 22:19:25 linux -- MARK --
Feb 20 22:39:25 linux -- MARK --
Feb 20 22:59:01 linux /USR/SBIN/CRON[11301]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 20 23:19:25 linux -- MARK --
Feb 20 23:39:25 linux -- MARK --
Feb 20 23:59:01 linux /USR/SBIN/CRON[17836]: (root) CMD ( rm -f /var/spool/cron/lastrun/cron.hourly)
Feb 21 00:00:01 linux /USR/SBIN/CRON[17962]: (root) CMD ( test -x /usr/lib/secchk/security-control.sh && /usr/lib/secchk/security-control.sh daily &)
Feb 21 08:23:45 linux syslogd 1.4.1: restart.
Feb 21 08:23:50 linux /etc/hotplug/usb.agent[6077]: unknown command '--fast'
Feb 21 08:23:50 linux /etc/hotplug/usb.agent[6140]: unknown command '--fast'
Feb 21 08:23:50 linux /etc/hotplug/usb.agent[6195]: unknown command '--fast'
Feb 21 08:23:50 linux slapd[6027]: @(#) $OpenLDAP: slapd 2.2.24 (May 31 2005 14:46:29) $         abuild@g174:/usr/src/packages/BUILD/openldap-2.2.24/servers/slapd
Feb 21 08:23:50 linux sshd[6241]: Server listening on :: port 22.
Feb 21 08:23:50 linux kernel: klogd 1.4.1, log source = /proc/kmsg started.
Feb 21 08:23:50 linux kernel: Adding 1050616k swap on /dev/sda2.  Priority:42 extents:1
Feb 21 08:23:50 linux kernel: Adding 1050616k swap on /dev/sdb2.  Priority:42 extents:1

在21号00：00点的时候死机了

Feb 21 08:23:50 linux kernel: Adding 1050616k swap on /dev/sda2.  Priority:42 extents:1
Feb 21 08:23:50 linux kernel: Adding 1050616k swap on /dev/sdb2.  Priority:42 extents:1
看样子是有BUG，有内存泄漏，内存资源不够了