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Il 29/07/2016 10:43, John R Pierce ha
scritto:
350 DBs with about 130 tables and a bunch of sequences each, for the sake of precision. With extensive use of BLOBs. Yes, that's another big problem... we run normally between 500 and 700 concurrent connections... I had to set max_connections=1000, the whole thing grew up faster than we were prepared for... That will be step 2... while migration is running (and will run for some months, we have to plan migration with users) I'll test putting another one or two machines in cluster, make some test cases, and when ready, databases will be migrated on other machines, too. I posted a question about this some months ago, and I was told that one solution would be to set the servers to be master on some databases and slave on others, so we can have a better load balancing (instead of having all writes on the sole master, we split among all masters depending on which database is getting the write command, especially when having to write BLOBs that can be some megabytes in size). I don't know to achieve this, but I will find a way somewhere. ideas are always precious and welcome.
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