AlliedModders - Sudden lag spikes on csgo server

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Sudden lag spikes on csgo server

Hello,
I have been running a csgo 1v1 server for a few months perfectly fine (128 tick max 32 slots) and I encountered no issue whatsoever (so far). Even when there were 30 players the server was perfectly fine. However after the latest steam update (the one that broke all 1v1 servers for a while) the server started lagging every so often.
Here is an image of that https://i.imgur.com/1hi7KXN.png

Im not sure whats causing it, I am running it on a KVM VPS 2GB ram and 2 Cores @3.7GHz (there is only 1 csgo server on the VPS), as previously it was fine with 30 players, and now it starts lagging at 5-8 or even less.
The cpu usage is around 50-60% and RAM usage just below 30% (doesnt go above 50% when there are ~20 players)
Is it the csgo update, sourcemod update, plugin or is it my VPS.
I could do a do-release-upgrade but im not sure that would solve the issue.
Is there anything i could try to make it less laggy?

Here is the start command (im using Linux_GSM)

Code:

./srcds_run -game csgo -usercon -nohltv +net_public_adr XX.XX.XX.XX +ip XX.XX.XX.XX +hostport 27015 -maxplayers_override 32 +map am_grass2 +rcon_password PASSWORD +host_players_show 0 -zone 2048 -pingboost 2 -tickrate 128 +sv_pure 1 +game_type 0 +game_mode 0 +mapgroup mg_active +exec server.cfg +mapchangecfgfile server.cfg +hostname SERVERNAME