tweak big tests

Author: mlin

test/genomicsqlite_big_tests.wdl

@@ -1,4 +1,5 @@
 version 1.0
+# Tests GenomicSQLite loaders, queries, & misc ops on some full-size datasets
 
 workflow genomicsqlite_big_tests {
     input {
@@ -129,7 +130,7 @@ task test_sam {
 
         # add a QNAME-sorted seqs table
         chmod +x /usr/lib/python3.8/genomicsqlite.py
-        time /usr/lib/python3.8/genomicsqlite.py "~{dbname}" "CREATE TABLE reads_seqs_by_qname AS SELECT * from reads_seqs NOT INDEXED ORDER BY qname"
+        time /usr/lib/python3.8/genomicsqlite.py "~{dbname}" "PRAGMA cache_size=-4194304; CREATE TABLE reads_seqs_by_qname AS SELECT * from reads_seqs NOT INDEXED ORDER BY qname"
         >&2 ls -l "~{dbname}"
         time /usr/lib/python3.8/genomicsqlite.py "~{dbname}" "PRAGMA journal_mode=off; DROP TABLE reads_seqs_by_qname"
         >&2 ls -l "~{dbname}"