Limits

In-game Entities

Type	Limit (0.3.7)
Players	1000
Vehicles⁽⁴⁾⁽⁶⁾	2000
Vehicle Models⁽¹⁾	Unlimited
Objects⁽⁴⁾⁽⁶⁾	1000
Virtual Worlds	2,147,483,647
Interiors	256
Classes	320
Map Icons⁽⁴⁾	100
Race Checkpoints⁽⁴⁾	1
Checkpoints⁽⁴⁾	1
Pickups⁽⁴⁾	4096
Global 3D Labels⁽⁴⁾	1024
Per-player 3D Text Labels⁽⁴⁾	1024
Chat Bubble String	144 characters
SetObjectMaterialText, SetPlayerObjectMaterialText Text length	2048 characters
Gangzones	1024
Per-player Gangzones	1024
Menus	128
Attached player objects	10
Player Variables	800
Server Variables (0.3.7 R2/omp)	Unlimited
Actors (since 0.3.7)⁽⁴⁾⁽⁵⁾	1000
Explosions	10

Type	Limit (0.3.7)
String Length⁽²⁾	1024 characters
Shown In A Single Client's Screen⁽³⁾	2048 + 256
Shown In A Single Client's Screen (sprites)	100
Created Serverwise (Global)	2048
Created Serverwise (Per-Player)	256

Type	Limit (0.3.7)
Dialog IDs	32768
Info (Main text)	4096
Caption	64
Input Text Box (DIALOG_STYLE_INPUT/PASSWORD)	128
Tab List Columns (DIALOG_STYLE_TABLIST(_HEADERS))	4
Tab List Column Characters (DIALOG_STYLE_TABLIST(_HEADERS))	128
Tab List Row Characters (DIALOG_STYLE_TABLIST(_HEADERS))	256

Notes:

Although the vehicle model limit in 0.3 is unlimited, if you use a large amount of vehicle models then it will affect client performance.
Although the textdraw string limit is 1024 characters, if colour codes (e.g. r) are used beyond the 255th character it may crash the client.
It is possible to show all Textdraws at the same time for one player, however this is not recommended.
To circumvent these limits, it is possible to use a streamer. Streamers work by only creating the entities etc. that are close to players.
Due to client limitations only up to 51 actors may actually be shown at a time.
Vehicle IDs start at ID 1 and thus range from 1 to 1999, even if MAX_VEHICLES is 2000. Objects and player objects also start at ID 1.