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https://issues.apache.org/jira/browse/GEODE-1672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karen Smoler Miller updated GEODE-1672:
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Component/s: docs
> When amount of overflowed persisted data exceeds heap size startup may run
> out of memory
> ----------------------------------------------------------------------------------------
>
> Key: GEODE-1672
> URL: https://issues.apache.org/jira/browse/GEODE-1672
> Project: Geode
> Issue Type: Bug
> Components: docs, persistence
> Reporter: Darrel Schneider
>
> Basically, when the amount of data overflowed approaches the heap size, ,such
> that the total amount of data is very close to or actually surpasses your
> total tenured heap, it is possible that you will not be able to restart.
> The algorithm during recovery of oplogs/buckets is such that we don't "evict"
> in the normal sense as data fills the heap during early stages of recovery
> prior to creating the regions. When the data is first created in the heap,
> it's not yet official in the region.
> At any rate, if during this early phase of recovery, or during subsequent
> phase where eviction is working as usual, it is possible that the total data
> or an early imbalance of buckets prior to the opportunity to rebalance causes
> us to surpass the critical threshold which will kill us before successful
> startup.
> To reproduce, you could have 1 region with tons of data that evicts and
> overflows with persistence. Call it R1. Then another region with persistence
> that does not evict. Call it R2.
> List R1 fist in the cache.xml file. Start running the system and add data
> over time until you have overflowed tons of data approaching the heap size in
> the evicted region, and also have enough data in the R2 region.
> Once you fill these regions with enough data and have overflowed enough to
> disk and persisted the other region, then shutdown, and then attempt to
> restart. If you put enough data in, you will hit the critical threshold
> before being able to complete startup.
> You can work around this issue by configuring geode to not recovery values by
> setting this system property: -Dgemfire.disk.recoverValues=false
> Values will not be faulted into memory until a read operation is done on that
> value's key.
> If you have regions that do not use overflow and some that do then another
> work around is the create the regions that do not use overflow first.
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