Adding to this, to help google searches, that Available Memory is called "Freeable Memory" in Amazon RDS. Of course we have no clue about the dirty ratio settings there but may be interesting to compare "FreeableMemory" with "WriteLatency"
(the screenshot doesn't come from a issue, just to show where to find those metrics, and in all cases correlation doesn't imply causation)
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Adding to this, to help google searches, that Available Memory is called "Freeable Memory" in Amazon RDS. Of course we have no clue about the dirty ratio settings there but may be interesting to compare "FreeableMemory" with "WriteLatency"
(the screenshot doesn't come from a issue, just to show where to find those metrics, and in all cases correlation doesn't imply causation)