This website uses cookies to store information on your computer. Some of these cookies are used for visitor analysis, others are essential to making our site function properly and improve the user experience. By using this site, you consent to the placement of these cookies. Click Accept to consent and dismiss this message or Deny to leave this website. Read our Privacy Statement for more.
Frits Hoogland

All About Linux Memory Usage by the Oracle Database

Frits Hoogland, Accenture Enkitec



Memory usage of a virtual memory systems like linux always have been shrouded in mystery, with admins setting parameters by best practice rather than based on measurable facts specific for that machine and workload. This presentation explains how memory is allocated and used on Linux (and when it isn’t!), after which different database memory scenario’s are replayed on a virtual machine showing how memory allocations behave. Because of the delayed allocation, oversubscription of memory will in most cases not become visible at database startup time, but rather after running for some time, depending on memory need, which can be minutes, but also very easily after a few days. Without awareness of linux memory allocation strategies, oversubscription indicators like sudden swapping will seem to happen random. The gist if the talk is not Oracle database specific, however, it will use Oracle database scenario’s.

Speaker Biography

More details coming soon.