Game lags every few seconds

[SpacedInvader]

As I'm playing, my game seems to stutter / pause for 0.5-1 seconds every 10-20 seconds. I have plenty of RAM available still, and my CPU isn't getting anywhere close to max, so I'm wondering what could be causing the issue? I'm running 1.1.3 and here is my mod list:

KSP: 1.1.3 (Win64) - Unity: 5.2.4f1 - OS: Windows 7 Service Pack 1 (6.1.7601) 64bit
000_AT_Utils - 1.0.1
Filter Extensions - 2.6
Toolbar - 1.7.12
USI Tools - 0.7.4
Zero-Point Inline Fairings - 1.0.2
ABookCase Orbital Reference System - 0.3
Advanced Jet Engine - 2.7.2
Animated Decouplers - 1.3.2
B9 Animation Modules - 1.0.3
B9 Part Switch - 1.4.3
B9 Aerospace - 6.1.2
B9 Aerospace - 6.1.2
B9 Aerospace HX Parts - 6.1.2
B9 Aerospace Procedural Parts - 0.40.7
Chatterer - 0.9.90.1289
Community Resource Pack - 0.5.4
Connected Living Space - 1.2.2.1
Contract Configurator - 1.17
ContractFilterContinued - 0.1.1.1
Contract Pack: Anomaly Surveyor - 1.7
CC-CP-SCANSat - 0.6.0.1
Contract Pack: Clever Sats - 1.3
Contract Pack: Field Research - 1.2
Contract Pack: Kerbal Academy - 1.1.4
Contract Pack: Bases and Stations - 3.4
Contract Pack: RemoteTech - 2.1.3
Contract Pack: Sounding Rockets - 1.2
Rover Missions - 0.1.6
Contract Pack: Unmanned Contracts - 0.3.25
Contract Reward Modifier - 1.0.2.3
CryoEngines - 0.3.5
Custom Asteroids - 1.3.1
CustomBarnKit - 1.1.9
Deadly Reentry - 7.4.7
DMagic Orbital Science - 1.3.0.2
CapCom Mission Control On The Go - 1.0.2.4
Contract Parser - 1.0.4
Contracts Window Plus - 1.0.6.4
Progress Parser - 1.0.5
EditorExtensionsRedux - 3.2.14
Engine Lighting - 1.4.5
EVA Transfer - 1.0.4
Ferram Aerospace Research - 0.15.7.2
Firespitter - 7.3
Flexible Docking - 1.0.2
Impact - 1.4.2
Interstellar Fuel Switch - 2.1.4
JSIAdvTransparentPods - 0.1.7
RasterPropMonitor - 0.27
Kerbal Attachment System - 0.5.9
keepfit - 0.10.7.5
KerbalAtomics - 0.2.5
Kerbal Construction Time - 1.3.4
Kerbal Engineer Redux - 1.1.1
Kerbal Joint Reinforcement - 3.2
HyperEdit - 1.5.2.1
Kerbal Inventory System - 1.2.12
kOS - 1.0
KRASH - 0.5.21
Historian Extended - 1.2.4.12
KSP-AVC Plugin - 1.1.6.1
KWRocketryRedux - 3.0.12
MagiCore - 1.1.2
Infernal Robots - 2.0.5
Infernal Robotics Sequencer - 1.0
MarkIVSystem - 2.2.1
Modular Rocket Systems - 1.12.8
ModularFlightIntegrator - 1.1.6
Docking Port Alignment Indicator - 6.4
NearFutureConstruction - 0.6.4
NearFutureElectrical - 0.7.7
NearFuturePropulsion - 0.7.4
NearFutureSolar - 0.6.2
NearFutureSpacecraft - 0.5.1
NRAP - 1.5.1.1
Outer Planets Mod - 2.0
PEBKAC Launch Escape - 1.1.3.2
PlanetShine - 0.2.5
Procedural Parts - 1.2.5
QuickSearch - 3.0.2
RCS Build Aid - 0.8.1
RealChute - 1.4.1.1
RealFuels Stockalike Configs - 3.2.1
RealPlume - Stock - 0.10.9
Real Scale Boosters - 0.14.5
ReentryParticleEffect - 1.1
RemoteTech - 1.7.1
AmpYear - 1.3.6
DeepFreeze Continued... - 0.22.3
IONRCS - 0.1.3
SCANsat - 1.1.6.6
SETI-Contracts - 0.9.7.1
SETI-ProbeParts - 1.0.1.1
SETI-Rebalance - 0.9.7.2
SETI-RemoteTechConfig - 1.0.9
ShipManifest - 5.1.2.2
SolverEngines - 2.3
SpaceY Expanded - 1.1.11
SpaceY Lifters - 1.13.1
TAC Fuel Balancer - 2.8
TextureReplacer - 2.4.13
ThrottleControlledAvionics - 3.2.2
TAC Life Support - 0.12.2
TimeControl - 2.2.2
Kerbal Alarm Clock - 3.7.1
Alternate Resource Panel - 2.8.1
Transfer Window Planner - 1.5.1
TweakScale - 2.2.13
USI Core - 0.2.4
Asteroid Recycling Tech - 0.8.4
USI Exploration Pack - 0.5.4
Freight Transport Tech - 0.5.4
Karbonite - 0.7.4
Karbonite Plus - 0.6.4
Kolonization Core - 0.2.4
Konstruction - 0.1
Malemute Rover - 0.1.4
Sounding Rockets - 0.4.4
UKS - 0.40.4
VenStockRevamp - 1.9.5
Waypoint Manager - 2.5.3
WildBlueTools - 1.4.2
Buffalo - 0.6.2
Pathfinder - 0.9.39
[x] Science! - 4.20

System Specs:

i7-4770K

GTX 960

16GB

KSP installed on an SSD

 

Any help would be appreciated.

 

EDIT: after some additional searching, I've found lots of references to garbage collection causing this, however, I've never experienced this before, even with a nearly identical mod list on 1.1.2, so I'm wondering if something changed?

Edited August 25, 2016 by SpacedInvader

[Bombaatu]

Not an answer - I have the same issue. 

Processor: AMD FX 8350 8-core 4ghz; 16gb ram, Video: AMD Radeon R9 390 w/ 8GB GDDR5 VRAM

[Galileo]

The OP is right.  It's garbage collection.  There is no fix for as its a unity thing.  There is a "mod"  named memgraph that helps supposedly.  This happens with large mod builds. More mods=more garbage so the collection process happens more often.  This will happen especially when you have a lot of part mods in your gamedata.  I suggest thinning them out or just removing the ones you don't really need 

This will happen regardless of how good your specs are. Nobody is safe from the gc. 

Edited August 25, 2016 by Galileo

[ljonka]

Yeah, happened to me after I installed B9. 

Quote

Nobody is safe from the gc. 

 

[joebopie]

This is still happening and so far I've not seen anything to suggest they know about it or are trying to fix it.... this makes the performance improvements of U5 totally irrelevant as now get lag spikes.

[Bornholio]

As Galileo & OP stated it is garbage collection and one of the few fixes (not a panacea or perfect fix either) is the Mod Memgraph, however if you use it with a large mod pool you should also turn up the padheap setting to a larger limit allowed by installed memory.

First run KSP with it installed, increase the resolution (Alt+) load a heavy part count ship, and check your number for max, it will climb the longer the game is on. and the stutters will be graphed as red lines spikes.  This red line is the garbage collection. Likely with your list your above 2gig even at start. Now exit and edit the padheap.cfg at [...\Kerbal Space Program\GameData\MemGraph\PluginData\MemGraph\padheap.cfg]

The padheap.cfg last line [total  : 2048] to a larger but within your RAM limit number, for instance if you have 8gig, you might set this number to 4096, since OS operation and other programs are likely to stay less than 4gig.

As a note [ALT * ] turns off the memgraph display, but not its functions.

You may still have some stutter but duration and frequency will go down.

 

 

 

 

 

[TheKorbinjer]

If it's not a problem, try putting this into Launch Options before you launch the game: 

-force-opengl

With all of those mods, this will definitely reduce memory leakage. Any background processes that are running could be drawing some power to it. Close those off.

If that doesn't work, reduce your graphics in the game until it's suitable to your tastes (pretty looking?) and isn't laggy anymore.

Edited March 7, 2017 by TheKorbinger