Performance
From OpenSimulator
Introduction
OpenSim performance is a very complex issue. Performance can be affected by any number of things, including the number of prims on a region, number of regions, number of avatars, network quality between server and viewer, network quality between simulator and grid services, etc.
Hardware Requirements
Unfortunately, this is a very difficult question in light of all the factors mentioned above. However, we can say that OpenSimulator does not run well when it only has access to a single CPU core - you should regard a dual-core machine as the minimum.
Below are some examples of hardware people use/have used. Please feel free to add to the list, or to add any reports to the performance studies and blog posts section. These are examples to help you in your selection, not necessarily recommendations.
Object Parts ~= # prim
Sensors and Timers are generally more intensive then regular scripts, so please specify quantity of each.
| Description | Operating System (please add Mono version if appropriate) | OpenSim version | RAM/AVG_USE_% | CPU | #/type of regions | # simultaneous avs | #scripts/timers/Sensors | Location | #objectparts |
|---|---|---|---|---|---|---|---|---|---|
| hosted Xen VPS | Ubuntu Intrepid (8.10) | Unknown | 540MB/? | 1x quad-core 2.5GHz Xeon (L5420) | 1 region + 9 voids | generally 1-2 | few | Knifejaw Atoll & surrounding on OSGrid | ? |
| hosted Xen VPS | Ubuntu Jaunty (9.04) | Unknown | 360MB/? | 2x dual-core 2.0GHz Xeon (5130) | 1 void | generally 1-2 | none | Knifejaw Road on OSGrid | ? |
| Dedicated Server from A+ | Windows Server 2003 | Unknown | 1 Meg | 1x single-core 2.8GHz Celeron | 2regions per server | 6 at once with no issues | Waterfalls, texture anims, window texture switchers, lots of sound loops | Pleasure Planet Welcome center & Region Pleasure Planet in OSGrid | 20000 prims per region |
| Amazon EC2 "high-CPU medium instance" (Xen VM) | Windows Server 2003 | Unknown | 1.7GB | 1x dual-core 2.3GHz (Intel E5345) | 1 region with sailing race course | 7 avs, 4 in boats | scripted start line | Castle Rock, OSGrid | |
| Dedicated Server from simhost.com | SuSe 11.2 x64 | Unknown | 8gb / 50% | 4x Core2Quad Q9300 2.6ghz | 1 region (Wright Plaza) uses approx 4gb ram | 20-25 users | Freebie Stores / Meeting Center / Video Theater | @osgrid.org Heavy Use Sim | 17500 prims aprox 1500 scripts |
| Home machine | Windows XP SP3 | 0.7.0.1 (Diva r13558) | 3GB / 15-40% incl. Opensim and MySQL | 4x Core2Quad Q6600 2.4 GHz. Use: generally, 0-10% | 11 regions | 1-6 users | Many scripted objects (1934 scripts) | Condensation Land | 38,065 prims |
| Home machine | Ubuntu Lucid 10.04 (32 bit pae) | 0.7.0.1 (Diva r13558) | 160Mb no users, add 5Mb/user incl Opensim and MySQL | I7-920 (dual threaded quad core), 3.8Ghz, 6Gb RAM, 0-10% Load | 4 regions (Diva default config) | 1-4 users (approx 20Kb/sec bandwidth/user) | Few scripted objects (<10) | Mars Simulation- Based on Erik Nauman's Open Blackboard | 158 prims |
| Hosted Parallels Virtuozzo 4.5 | Win/Net (32 run) | 0.7.0.2 (D2) | 420Mb total, incl OS, Opensim and MySQL | i7 Quad 950 (Bloomfield) 3.07GHz, 8 Core, 2Gb RAM, 0-2% Avg Load | 16 regions (4x4 mega-region) | <6 users | vehicle scripted objects (<5) | Metaverse Sailing | <1000 prims |
| VPS | Debian Lenny 5 (mono 2.4.2.3) | OSgrid 0.7.1 (Dev) cd4d7a7: 2010-10-15 | 655MB average out of 1722MB RAM, incl. MySQL | Intel Quadcore 2.5 Ghz (1 core assigned to vps) average use: 40-45% | 20 regions | <4 users | about 20 different light scripts, but we're also experimenting with heavier HUD scripts (timers, lots of ll(Get/Set)PrimitiveParams and large lists) and custom IRC relay | Phoenix Rising Isles on OsGrid | 3727 prims |
Performance studies and blog posts
These provide some interesting data on the performance limitations of OpenSim at various points in time.
- https://lists.berlios.de/pipermail/opensim-users/2010-August/005189.html - Some interesting information from Mr Blue. Physical objects and max avatars are limited by single thread performance in OpenSim.
- http://www.sciencesim.com/wiki/doku.php/vwperf/start - Links to ScienceSim performance studies, including some very recent ones.
- Improving Performance - An old page from July 2009 detailing some performance issues on OpenSim. Some of these issues are still valid (e.g. ODE issues).
- NHibernate Performance Testing — SQLite and MySQL performance tests with NHibernate.
- LibSecondLife performance problems - Another old page from November 2007 detailing issues with libsecondlife (now called libopenmetaverse).
- Experiences from Operating a 3D Region Server in OSGrid - Part 1
- Experiences from Operating a 3D Region Server in OSGrid - Part 2
