TF2 Server crashes after 20 people

[supertumor]

Hello, I'm running a 24 person tf2 server and every time the player count exceeds 20 people, the server gives everyone a major lagspike (ping like in the 800s) then it crashes.

Is this a tickrate issuse? I checked it out with netgraph and my server has a tickrate of 33, i'd like to expand it to 66 but im not sure how, what do you think is causing my server to crash after 20 people join?

CPU: AMD Phenom Quad core 2.60 GHz
RAM: 4 GB
HDD:320 GB SATA
OS: Vista Home Premium (64 bit)

Please let me know if you need more info.

[Mooga]

What mods are you running?
What map is running? Is it custom?

[supertumor]

Mooga Wrote:What mods are you running?
What map is running? Is it custom?

It runs sourcemod, the map is Balloon_race_v1, so it's a custom map.

[Mooga]

It's possible the map does not support more then 20 people. Some maps are made badly and crash with too many users.

[Derek]

Mooga Wrote:It's possible the map does not support more then 20 people. Some maps are made badly and crash with too many users.

Mooga is correct, I would put my money that it's the custom map.