revise samtools sort -m

tasks/samtools.wdl

@@ -16,7 +16,7 @@ task samtools {
        set -e
        nt=$(nproc)
        /opt/conda/bin/samtools view -@ $nt -bS ${sam} > ${bam}
-       /opt/conda/bin/samtools sort -@ $nt -m 2GiB ${bam} -o ${sorted_bam}
+       /opt/conda/bin/samtools sort -@ $nt -m 1000000000 ${bam} -o ${sorted_bam}
        /opt/conda/bin/samtools index -@ $nt ${sorted_bam}
        /opt/conda/bin/samtools stats -@ $nt ${sorted_bam} > ${samstats}
        /opt/conda/bin/samtools stats -@ $nt -i ${insert_size} ${sorted_bam} |grep ^IS|cut -f 2- > ${ins_size}