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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: Archiver Appliance - Limit on PVs |
| From: | Sky Brewer via Tech-talk <tech-talk at aps.anl.gov> |
| To: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov> |
| Date: | Wed, 29 Jan 2025 12:42:37 +0000 |
|
Hi Eusebio, You probably want to change some options in the properties file. The default file is at
Changing each property can then have different performance impact, for instance increasing org.epics.archiverappliance.config.PVTypeInfo.sampleBufferCapacityAdjustment
Will increase the memory usage. You probably want to increase org.epics.archiverappliance.mgmt.MgmtRuntimeState.archivePVWorkflowBatchSize which has a default of 1000. It’s how many PVs are acceptable to be in the intialSampling stage. And decrease org.epics.archiverappliance.mgmt.bpl.ArchivePVAction.minimumSamplingPeriod = 0.1 which specifies the minimumSamplingPeriod. In some sense there is not a limit on how small this can be, it’s more how much memory you have for the Archiver Appliance to run to. If you saturate the memory, then it will start dropping events. Hope this helps Sky |