spark params optimize

dash/params.py

@@ -80,7 +80,7 @@ min_chunksize = 5e5 # minimum chunk size for n5/zarr export (in bytes)
 time_add_buffer = 0.2 # time buffer for job submission (relative)
 
 n_cpu_script = 24
-mem_per_cpu = 3     # GB
+mem_per_cpu = 2     # GB
 
 # standalone
 
@@ -90,7 +90,7 @@ n_cpu_standalone = 8
 # spark
 
 n_cpu_spark = 200
-cpu_pernode_spark = 20
+cpu_pernode_spark = 15
 
 mipmaps=dict()
 mipmaps['min/Gpix/CPU'] = 6