So, in general, the optimum RAM usage is as high as possible, without making the system needing to swap out important parts of available memory. This makes it very easy to control the exact amount of memory that will be used in a live situation, and one can be pretty sure that the actual amount of RAM used will never go far beyond the values set. To make use of the available RAM as best as possible, Kopano is designed to use only a fixed amount of physical RAM the memory usage does increase per user that connects, but only by a small amount - the largest part of the memory usage is due to cache settings in the configuration file. It is therefore important to set the RAM usage of various components to a high enough setting to use the RAM available, and at the same time not to set the RAM usage too high. On the other hand, setting RAM usage too high may cause the server to swap out parts of the memory which need to be swapped back in later, causing a large slowdown in all parts of the server. Tuning memory usage is one of the best ways of increasing server performance as RAM is generally cheap, using a large amount of RAM in the server properly can boost performance by orders of magnitude. Please create a ticket with the Kopano support to retrieve it. There is also a more advanced tuning guide available to customers with a valid subscription. Always make sure that other factors are taken into account - for example an anti-spam system or a webserver running a site other than the Kopano WebApp. This document assumes the primary role of the server is to run Kopano. Any installation with 50 or more users should definitely tune the cache parameters for maximum performance. When installing a Linux server with Kopano, it is imperative that MySQL is correctly configured to achieve maximum performance on the server almost all performance bottlenecks are within the database access itself, so getting the SQL queries to run as quickly as possible is very important.įor large installations, it is strongly advised to tune Kopano’s cache parameters as well These are normally set quite low to make sure that Kopano can run on relatively low-end servers, but in anything but the smallest installations, these defaults needs to be upped. Kopano’s indexedobject cache ( cache_indexedobject_size) Kopano’s object cache ( cache_object_size) High rotation speed (RPMs) for better database performance
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