fix: reduce memory limit for OLTP matrix scripts to improve stability

Author: tae898

bindings/python/examples/scripts/run_07_tables_oltp_matrix.sh

@@ -26,7 +26,7 @@ DATASET="stackoverflow-large"
 TRANSACTIONS=250000
 BATCH_SIZE=10000
 MEM_LIMIT="8g"
-THREADS=4
+THREADS=1
 RUNS=1
 SEED_START=0
 JVM_HEAP_FRACTION="0.80"

bindings/python/examples/scripts/run_09_graph_oltp_matrix.sh

@@ -29,7 +29,7 @@ ARCADEDB_TRANSACTIONS=250000
 LADYBUG_TRANSACTIONS_FRACTION=1
 GRAPHQLITE_TRANSACTIONS_FRACTION=0.1
 BATCH_SIZE=10000
-MEM_LIMIT="16g"
+MEM_LIMIT="8g"
 THREADS=1
 RUNS=1
 SEED_START=0