Ask the Community
Groups
High RAM utilisation on KDB private storage server - Connect IT Community | Kaseya
<main> <article class="userContent"> <p><strong>PROBLEM</strong></p> <p>The following symptoms occur on a KDB private storage server: -</p> <ul><li>Available memory is almost exhausted.</li> <li>The system file cache consumes most of the physical RAM</li> <li>There is a continuous and high volume of cached read requests to the hard disk</li> </ul><p>Rebooting the system temporarily resolves the issue, but RAM usage continually increases until there is almost none available again.</p> <p> </p> <p><strong>CAUSE</strong></p> <p>This MS article describes how this situation arises, and how to identify it - <a href="/home/leaving?allowTrusted=1&target=https%3A%2F%2Fsupport.microsoft.com%2Fkb%2F976618" rel="noopener nofollow">https://support.microsoft.com/kb/976618</a></p> <p>KDB may cause the cache to grow large because it creates a large number of small files in the backup store, especially if there are many agents backing up to the same storage server.</p> <p> </p> <p><strong>SOLUTION</strong></p> <p>Possible solutions include: -</p> <p>1) add more physical RAM to the server</p> <p>2) decrease the workload on the storage server (for example, by splitting backup agents among several storage servers)</p> <p>3) avoid running other RAM intensive applications on the same server as the private storage server</p> <p>4) as noted in the MS article linked above, there is a Windows utility to restrict the size of the cache. This will increase the amount of RAM available for other applications, but please note that it may <em>decrease</em> file system performance, which in turn may affect backup/restore times.</p> <p> </p> <p><strong>FURTHER INVESTIGATION</strong></p> <p>If further assistance is needed, please provide Kaseya support with the following information: -</p> <p>1) screenshot from <a href="/home/leaving?allowTrusted=1&target=http%3A%2F%2Ftechnet.microsoft.com%2Fen-gb%2Fsysinternals%2Fff700229.aspx" rel="noopener nofollow">RAMmap utility</a> showing use counts</p> <p>2) number of agents backing up the storage server</p> <p>3) troubleshooting steps taken so far</p> <p> </p> <p><strong>APPLIES TO</strong></p> <p>Kaseya VSA (all versions)</p> <p>Data Backup (KDB)</p> </article> </main>