Using membase for session management in PHP
we recently migrated our PHP website to use a Membase bucket (on 5 nodes) for Session handeling.
We allocated 1.5GB memory to this bucket ( 5*1.5GB ) and as soon as we hit 90% usage in the bucket, then our users can't login anymore in the application. As soon as we allocate more memory, then everything is working perfectly again. There are very few writes going to the disk. 250 ops/sec and 5 disk fetches / second also.
We don't see any errors, so we have no clue what the exact problem is.
Does someone have a golden tip to help us?