Does 8MB for redo_log_buffer seem excessive
Also
db_block_size = 16384
db_file_multiblock_read_count = 64
db_keep_cache_size = 150M
db_cache_size = 900M
java_pool_size = 64M
shared_pool_reserved_size = 32M
shared_pool_size = 160M


At what point does too much memory become a hinderance if any


Thanks
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