The base rule is keep at 4K unless there is a very good reason to change it.
See here: https://apacheignite.readme.io/docs/durable-memory-tuning#page-size also try to turn on direct IO: https://apacheignite.readme.io/docs/durable-memory-tuning#enabling-direct-io small page sizes might cause amplification on the hardware level: https://www.cactus-tech.com/resources/blog/details/write-amplification-as-seen-in-solid-state-drives Large page size might causes write amplification By ignite. The whole 16k page will be persisted if you have changed only few bytes. It depends on the pageFillFactor: https://apacheignite.readme.io/docs/memory-metrics#getting-metrics // Get the metrics of all the data regions configured on a node. Collection<DataRegionMetrics> regionsMetrics = ignite.dataRegionMetrics(); // Print out some of the metrics. for (DataRegionMetrics metrics : regionsMetrics) { System.out.println(">>> Memory Region Name: " + metrics.getName()); System.out.println(">>> Allocation Rate: " + metrics.getAllocationRate()); System.out.println(">>> Fill Factor: " + metrics.getPagesFillFactor()); System.out.println(">>> Allocated Size: " + metrics.getTotalAllocatedPages()); System.out.println(">>> Physical Memory Size: " + metrics.getPhysicalMemorySize()); } If you see a pageFillFactor of say 60% consistently then data is not aligned correctly and extra pages w/corresponding read/writes are necessary. Here tuning the pageFillFactor might be neccessary Ignite does not read only one page at a time but uses a variety of algorithms to batch page reads/writes/replacements. Your particular use case dictates what the best parameters are. https://apacheignite.readme.io/docs/durable-memory-tuning#pages-writes-throttling see also: https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/ssd-server-storage-applications-paper.pdf detailed information on how Ignite persistence and memory pagination work: https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Persistent+Store+-+under+the+hood https://cwiki.apache.org/confluence/display/IGNITE/Ignite+Durable+Memory+-+under+the+hood -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
