Server keeps crashing, not sure how to fix it.

[Joe0207]

So, our server keeps crashing when it hits around 50-60 people, and now it's crashing even more often with less people on, I've done a tiny bit of research and apparently it's to do with the server sending too much data to clients or something, I've tried some sv_parallelscreenshot 0 or something like that, as someone said it was a fix, but the server crashed again after that so i've now removed it.
i was wondering if it's maybe to do with too many add-ons maybe? or maybe a conflicting addon?
Any help is appreciated.

From the logs:

ServerLog: GingerPopper (STEAM_0:1:46113397) is Authed

ServerLog: GingerPopper (STEAM_0:1:46113397) Spawned for the first time

[Connections | 12:47:59]GingerPopper(STEAM_0:1:46113397) has connected

ServerLog: GingerPopper (STEAM_0:1:46113397) Spawned

ERROR! SendData reliabe data too big (105191)[GM:CallWithArgs - !ThreadInMainThread] player_disconnect

[GM:CallWithArgs - !ThreadInMainThread] player_disconnect

-server-crash-

and this as well, showing what it says just before the crash

[url]http://prntscr.com/9llu4o[/url]

[Willox]

Is your server hosted on a Windows machine? If so, are there any crash dumps (.mdmp files) in the same directory as srcds.exe?

Regarding the parallel ConVars you've mentioned, try ensuring that both "sv_parallel_packentities" and "sv_parallel_sendsnapshot" are set to 0 and seeing if that fixes anything.

[YourStalker]

[QUOTE=Willox;49448668]Regarding the parallel ConVars you've mentioned, try ensuring that both "sv_parallel_packentities" and "sv_parallel_sendsnapshot" are set to 0 and seeing if that fixes anything.[/QUOTE]

I've seen you mention these two cvars a few times recently. What are their purpose and are they related to some kind of crash?