Ok, so basicly I'm crying
I'm suffering from a cringyiest memory leak I've ever experienced in my life. I'm sorry for posting my issue at this forum, yet it's the best place I've found(
I tried to make my own modpack. This is the second one I do, and it's pretty much almost the same as a first one, which I've lost and currently trying to recreate (It did not suffered from my problem!) But now, when I start solo/multi game, in few minutes Minecraft RAM usage rises up from 6 GB to a freaking 12 GB, even through the limit is set on 7 GB. I have to say, that it's probably game internal code leak, because even if you pause the game (Esc), RAM usage still rises.
I tried resampling modpack for severing times, yet... it is what it is.
Yes, I know that it's selfish to waste your time on reading and answering this, like why even would you , but I'm in despair, sorry.

Examples are attached...

Modlist:

OPTIFINE

AbyssalCraft
AbyssalCraft-1.12.2-1.10.3.jar
AbyssalCraft Integration
AbyssalCraft Integration-1.12.2-1.11.2.jar
Advent of Ascension (Nevermine)
AoA3-3.3.6.jar
AgriCraft
AgriCraft-2.12.0-1.12.0-a6.jar
AgriSeasons
agriseasons-1.12.2-1.0.2.jar
Ancient Spellcraft
AncientSpellcraft-1.1.1.jar
AppleCore
AppleCore-mc1.12.2-3.4.0.jar
AppleSkin
AppleSkin-mc1.12-1.0.14.jar
Astral Sorcery
astralsorcery-1.12.2-1.10.27.jar
Auto Ore Dictionary Converter
autooredictconv-1.12-1.0.1.jar
AutoRegLib
AutoRegLib-1.3-32.jar
Baubles
Baubles-1.12-1.5.2.jar
BdLib
bdlib-1.14.3.12-mc1.12.2.jar
BeeBetterAtBees
beebetteratbees-1.12.2-2.0.3.jar
BetterFps
BetterFps-1.4.8.jar
Binnie's Mods
binnie-mods-1.12.2-2.5.1.203.jar
Bio Library
biolib-1.1.2.jar
Block Drops (JEI Addon)
blockdrops-1.12.2-1.4.0.jar
Blood Arsenal
BloodArsenal-1.12.2-2.2.2-31.jar
Blood Magic
BloodMagic-1.12.2-2.4.3-105.jar
Botania
Botania r1.10-363.jar
BountifulBaubles
Bountiful Baubles-1.12.2-0.1.6.jar
Career Bees
careerbees-0.4.0.jar
Carry On
carryon-1.12.2-1.12.3.15.jar
Chameleon
Chameleon-1.12-4.1.3.jar
Chisel
Chisel-MC1.12.2-1.0.2.45.jar
Chunk-Pregenerator
Chunk Pregenerator-V1.12-2.4.1.jar
Client Tweaks
ClientTweaks_1.12.2-3.1.11.jar
Clumps
Clumps-3.1.2.jar
CodeChicken Lib 1.8.+
CodeChickenLib-1.12.2-3.2.3.358-universal.jar
CoFH Core
CoFHCore-1.12.2-4.6.6.1-universal.jar
CoFH World
CoFHWorld-1.12.2-1.4.0.1-universal.jar
Common Capabilities
CommonCapabilities-1.12.2-2.4.8.jar
Compendium
tinkersdefense-1.4.2.38.jar
ConnectedTexturesMod
CTM-MC1.12.2-1.0.2.31.jar
Controlling
Controlling-3.0.10.jar
Cooking for Blockheads
CookingForBlockheads_1.12.2-6.5.0.jar
Crafting Tweaks
CraftingTweaks_1.12.2-8.1.9.jar
Crash To Main Menu
CrashToMainMenu-client-1.12.2-1.0.0.jar
CreativeCore
CreativeCore_v1.10.40_mc1.12.2.jar
Cyclops Core
CyclopsCore-1.12.2-1.6.7.jar
Default Options
DefaultOptions_1.12.2-9.2.8.jar
Dynamic Surroundings
DynamicSurroundings-1.12.2-3.6.1.0.jar
Electroblob's Wizardry
ElectroblobsWizardry-4.3.2-MC1.12.2.jar
Extended Days
ExtendedDays-1.12.2-0.2.9-28.jar
Extra Spells (Electroblob's Wizardry)
ExtraSpells-1.12.2-1.2.0.jar
ExtraBotany
ExtraBotany-r1.1-58r.jar
Fast Leaf Decay
FastLeafDecay-v14.jar
FastFurnace
FastFurnace-1.12.2-1.3.1.jar
FastWorkbench
FastWorkbench-1.12.2-1.7.3.jar
Fnar's Roguelike Dungeons
RoguelikeDungeonsFnarEdition-1.12.2-2.2.0.jar
FoamFix
foamfix-0.10.11-1.12.2.jar
Forestry
forestry_1.12.2-5.8.2.387.jar
FTB Backups
FTBBackups-1.1.0.1.jar
FTB Library
FTBLib-5.4.7.2.jar
FTB Utilities
FTBUtilities-5.4.1.131.jar
Gendustry
gendustry-1.6.5.8-mc1.12.2.jar
Gendustry JEI Addon
gendustryjei-1.0.2.jar
Guide-API
Guide-API-1.12-2.1.8-63.jar
Hammer (Lib) Core
HammerLib-1.12.2-2.0.6.26.jar
Hwyla
Hwyla-1.8.26-B41_1.12.2.jar
InfinityLib
infinitylib-1.12.0.jar
Inventory Tweaks [1.12 only]
InventoryTweaks-1.63.jar
IvToolkit
IvToolkit-1.3.3-1.12.jar
JEI Bees
jeibees-0.9.0.5-mc1.12.2.jar
JEI Integration
jeiintegration_1.12.2-1.6.0.jar
JER Ore Integration
JEROreIntegration-1.12.2-1.1.0.jar
Journey Into the Light [JITL]
Journey-Into-The-Light-1.12.2-1.0.6.1.jar
JourneyMap
journeymap-1.12.2-5.7.1.jar
Just Enough HarvestCraft (JEHC)
just-enough-harvestcraft-1.12.2-1.7.2.jar
Just Enough Items (JEI)
jei_1.12.2-4.16.1.301.jar
Just Enough Resources (JER)
JustEnoughResources-1.12.2-0.9.2.60.jar
Just Enough Throwing In Fluids (JETIF)
jetif-1.12.2-1.5.2.jar
LibrarianLib
librarianlib-1.12.2-4.22.jar
Macaw's Bridges
mcw-bridges-1.0.4-mc1.12.2.jar
Macaw's Furniture
mcw-furniture-1.0.1-mc1.12.2beta.jar
Magic Bees
MagicBees-1.12.2-3.1.10.jar
Magical Psi
MagicalPsi-1.3.2.jar
Mantle
Mantle-1.12-1.3.3.55.jar
MattDahEpic Core (MDECore)
mdecore-1.12-1.1.jar
Memory Cleaner Mod
memorycleaner-1.2.jar
Metallurgy 4: Reforged
Metallurgy-4-Reforged-1.2.3.jar
MineColonies
minecolonies-1.12.2-0.11.804-RELEASE-universal.jar
Moar Tinkers
moartinkers-0.6.0.jar
ModelLoader
modelloader-1.1.7.jar
More Bees
morebees-1.12.2-2.0.1.jar
Morpheus
Morpheus-1.12.2-3.5.106.jar
Mouse Tweaks
MouseTweaks-2.10-mc1.12.2.jar
MrCrayfish's Furniture Mod
furniture-6.3.1-1.12.2.jar
NotEnoughIDs
NotEnoughIDs-1.5.4.4.jar
NuclearCraft: Overhauled
NuclearCraft-2o.4.7-1.12.2.jar
Oh The Biomes You'll Go
BiomesYouGo1.7.1.jar
OreLib
OreLib-1.12.2-3.6.0.1.jar
Pack Crash Info
packcrashinfo-1.0.1.jar
Pam's HarvestCraft
Pam's HarvestCraft 1.12.2zg.jar
Ping
Ping-1.12.2-1.4.5.jar
Placebo
Placebo-1.12.2-1.6.0.jar
PlayerRevive
PlayerRevive_v1.2.39_mc1.12.2.jar
Project: Vibrant Journeys
ProjectVibrantJourneys-1.12.2-1.6.4.jar
Psi
Psi-r1.1-78.2.jar
Psi: Combat Magic
PsiAddons-1.1.05.jar
Psionic Peripherals
psipherals-1.1.0.jar
Random PSIdeas
rpsideas-2.4.2.jar
RandomPatches (Forge)
randompatches-1.12.2-1.22.1.10.jar
RandomPatches Integration
rpintegration-1.12.2-1.5.1.0.jar
RandomTweaks
randomtweaks-1.12.2-2.8.2.2.jar
ReAuth
reauth-3.6.0.jar
Recurrent Complex
RecurrentComplex-1.4.8.2.jar
Redstone Flux
RedstoneFlux-1.12-2.1.1.1-universal.jar
Serene Seasons
SereneSeasons-1.12.2-1.2.18-universal.jar
Serene Tweaks
SereneTweaks-1.0.jar
Shadowfacts' Forgelin
Forgelin-1.8.4.jar
Silent Lib
SilentLib-1.12.2-3.0.14+168.jar
Sit
sit-1.12.2-v1.3.jar
Storage Drawers
StorageDrawers-1.12.2-5.4.2.jar
TAIGA (Tinkers alloying addon)
taiga-1.12.2-1.3.4.jar
Thaumcraft
Thaumcraft-1.12.2-6.1.BETA26.jar
Thaumcraft 6 Aspects for JEI
tc6aspects4jei-0.0.2a.jar
Thaumic Additions: Reconstructed
ThaumicAdditions-1.12.2-12.6.6.jar
Thaumic Augmentation
ThaumicAugmentation-1.12.2-2.0.13.jar
Thaumic Gadgets
Thaumic_Gadgets_1.12.2_0.1.5.1_tb.26.jar
Thaumic JEI
ThaumicJEI-1.12.2-1.6.0-27.jar
Thaumic Periphery
thaumicperiphery-0.3.1.jar
Thaumic Tinkerer
thaumictinkerer-1.12.2-5.0-620a0c5.jar
Thermal Cultivation
ThermalCultivation-1.12.2-0.3.6.1-universal.jar
Thermal Dynamics
ThermalDynamics-1.12.2-2.5.6.1-universal.jar
Thermal Expansion
ThermalExpansion-1.12.2-5.5.7.1-universal.jar
Thermal Foundation
ThermalFoundation-1.12.2-2.6.7.1-universal.jar
Thermal Innovation
ThermalInnovation-1.12.2-0.3.6.1-universal.jar
Tinker's JEI
tinkersjei-1.2.jar
Tinkers Construct
TConstruct-1.12.2-2.13.0.183.jar
Tinkers' Reforged
tinkers_reforged-1.5.0.jar
Tinkers' Tool Leveling
TinkerToolLeveling-1.12.2-1.1.0.jar
Toast Control
Toast Control-1.12.2-1.8.1.jar
Tomb Many Graves 2
TombManyGraves-1.12-4.2.0.jar
Underground Biomes
UndergroundBiomesConstructs-1.12-1.3.8.jar
UniDict
UniDict-1.12.2-3.0.4.jar
VanillaFix
VanillaFix-1.0.10-150.jar
Waila Harvestability
WailaHarvestability-mc1.12-1.1.12.jar
WanionLib
WanionLib-1.12.2-2.5.jar
Waystones
Waystones_1.12.2-4.1.0.jar
Wizardry Mod
wizardry-0.11.1.jar
WorldEdit
worldedit-forge-mc1.12.2-6.1.10-dist.jar
Worley's Caves
worleycaves-1.12.2-1.5.2.jar


(forge-14.23.5.2852)

Edited January 11, 20214 yr by ZetsuboNemurase

Please don't hurt me, I know some of the mods I added could be junked...