SIRIS, ALTO, and NAS: ShadowSnap Agent and Oracle VSS Memory Leak



This article discusses issues that may be found when using ShadowSnap's VSS backups as well as Oracle's Intellisnap backup engine.


  • ShadowSnap Agent
  • Oracle Intellisnap 11


As discussed in this article via IntelliSnap, there is a known issue with the Oracle VSS writer in Oracle 11:

"There is a known issue with Oracle VSS Writer memory leak (metalink ID 1358570.1). Hence, if Oravssw.exe consumes more memory, restart the service."


This issue primarily manifests with Oracle 11, although other versions may be affected. Our findings have shown that the memory leak can eventually make its way into the pagefile of a device and cause a server to run out of memory, hindering all server operations. Restarting the service is a known fix. If you'd like less VSS processes to be occurring, you can configure backups for the impacted server to use the STC Backup Engine, but the issue may still persist in the Oracle VSS writer.

Should this issue persist, contact Oracle support for further assistance.

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