My database environment is shared filesystem 11g RAC in HP-UX IA (64-bit).
Last week I changed FC storage to Flash storage.
I hoped well disk I/O. Read speed is well. But write speed is not well, speclally Redo Log File haved issue "Log File Sync".
I read MOS "Using 4k Redo Logs on Flash and SSD-based Storage (Doc ID 1681266.1)" and I applied 4k block size redo log file.
But I cann't solve the problem.
I plan to change storage RAID. redo log file zone will be RAID 0 + 1. data file zone will be Raid5.
Were there Another solutions like DB and OS parameter?