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From dkarachentsev <dkarachent...@gridgain.com>
Subject Re: Strange problems with Ignite native Persistence when Data exceeds Memory
Date Tue, 15 Aug 2017 07:04:10 GMT
Hi Roger,

It looks like not all data could fit in memory and pages started to swap
into disk. This means that too many pages marked as dirty that causes more
often and longer checkpointing, that with WAL writes may significantly
slowdown data uploading. Please attach Ignite and GC logs and try to set
PersistenceStoreConfiguration.setWalMode() to LOG_ONLY or BACKGROUND (this
will reduce disk loading).

Data loss looks strange, is it possible that you have duplicated entry keys?
DataStreamer by default does not override existed entries for performance


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