Verifying the journal mode is easy enough. Remount with data=writeback. It can be done one node at a time.
But since you upgraded from 4.5 to 5.5, you may have to cast a wider net considering the entire kernel also changed. On 03/11/2011 02:22 PM, Ulf Zimmermann wrote: > We upgraded our production database cluster (6 node) from EL4 Update 5 to EL5 > Update 5, including upgrading OCFS2 from 1.2.9 to 1.4.4. > > We are now noticing slowdown of batch jobs in Oracle, while hotbackup runs > faster. One thing we saw is that journal mode changed from write-back to > ordered, as we don't specify journal mode during mount. Oracle sees this as > slowdown based on higher IO latency, going from 6-8ms to 13-15ms for single > block IO. Total IO throughput has dropped. > > Can this be caused by the journal mode being ordered? > > Ulf. > > > _______________________________________________ > Ocfs2-users mailing list > Ocfs2-users@oss.oracle.com > http://oss.oracle.com/mailman/listinfo/ocfs2-users _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
