Error storing tag history

After some months without errors, I’m repeatedly getting the following error

INFO | jvm 2 | 2016/06/29 11:12:04 | ERROR [Provider[default] ] [11:12:04,683]: Error storing tag history. INFO | jvm 2 | 2016/06/29 11:12:04 | java.lang.Exception: Unable to add data to memory buffer, buffer full. INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.history.stores.MemoryStore.insertInBuffer(MemoryStore.java:162) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.history.stores.MemoryStore.syncdStoreData(MemoryStore.java:70) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.history.stores.AbstractStore.storeData(AbstractStore.java:225) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.history.DefaultStoreAndForwardEngine.storeData(DefaultStoreAndForwardEngine.java:173) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.history.HistoryManagerImpl.storeHistory(HistoryManagerImpl.java:167) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.sqltags.scanclasses.SimpleExecutableScanClass.processHistory(SimpleExecutableScanClass.java:936) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.sqltags.scanclasses.SimpleExecutableScanClass$ScanClassTagEvaluationContext.processAndReset(SimpleExecutableScanClass.java:1165) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.gateway.sqltags.scanclasses.SimpleExecutableScanClass.run(SimpleExecutableScanClass.java:896) INFO | jvm 2 | 2016/06/29 11:12:04 | at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$TrackedTask.run(BasicExecutionEngine.java:584) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.FutureTask.runAndReset(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) INFO | jvm 2 | 2016/06/29 11:12:04 | at java.lang.Thread.run(Unknown Source)

The Historical Tag Provider is based on SQL Server 2014, no partitioning, no pruning.
Any idea?

Thanks in advance, regards

If the buffer is full then your disk cache may be full as well. I would start by looking at the Status>Database Connections page of the gateway. This should give you a better idea of what is going on.