diff --git a/CHANGELOG.md b/CHANGELOG.md
index 384497c..69f955c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [[1.2.1](https://github.com/sanger-tol/readmapping/releases/tag/1.2.1)] - [2024-02-29]
+
+### Enhancements & fixes
+
+- Increased the memory requests for reruns of BWAMEM2_MEM and SAMTOOLS_SORMADUP.
+
 ## [[1.2.0](https://github.com/sanger-tol/readmapping/releases/tag/1.2.0)] – Norwegian Ridgeback - [2023-12-19]
 
 ### Enhancements & fixes
diff --git a/conf/base.config b/conf/base.config
index cdffac4..bfd327b 100644
--- a/conf/base.config
+++ b/conf/base.config
@@ -4,33 +4,6 @@
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
 
-/*
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-    Increasing the number of CPUs often gives diminishing returns, so we increase it
-    following a logarithm curve. Example:
-        - 0 < value <= 1: start + step
-        - 1 < value <= 2: start + 2*step
-        - 2 < value <= 4: start + 3*step
-        - 4 < value <= 8: start + 4*step
-    In order to support re-runs, the step increase may be multiplied by the attempt
-    number prior to calling this function.
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-*/
-
-// Modified logarithm function that doesn't return negative numbers
-def positive_log(value, base) {
-    if (value <= 1) {
-        return 0
-    } else {
-        return Math.log(value)/Math.log(base)
-    }
-}
-
-def log_increase_cpus(start, step, value, base) {
-    return check_max(start + step * (1 + Math.ceil(positive_log(value, base))), 'cpus')
-}
-
-
 process {
 
     errorStrategy = { task.exitStatus in ((130..145) + 104) ? 'retry' : 'finish' }
@@ -82,7 +55,7 @@ process {
 
     withName: 'SAMTOOLS_SORMADUP' {
         cpus   = { log_increase_cpus(2, 6*task.attempt, 1, 2) }
-        memory = { check_max( 10.GB + 0.6.GB * Math.ceil( meta.read_count / 100000000 ) * task.attempt, 'memory' ) }
+        memory = { check_max( 4.GB + 850.MB * log_increase_cpus(2, 6*task.attempt, 1, 2) * task.attempt + 0.6.GB * Math.ceil( meta.read_count / 100000000 ), 'memory' ) }
         time   = { check_max( 2.h * Math.ceil( meta.read_count / 100000000 ) * task.attempt / log_increase_cpus(2, 6*task.attempt, 1, 2), 'time' ) }
     }
 
@@ -113,7 +86,7 @@ process {
         time   = { check_max( 3.h * task.attempt *  Math.ceil(positive_log(meta2.genome_size/100000, 10)) * Math.ceil(meta.read_count/1000000000) * 12 / log_increase_cpus(6, 6*task.attempt, meta.read_count/1000000000, 2), 'time' ) }
         // Base RAM usage is about 6 times the genome size. Each thread takes an additional 800 MB RAM
         // Memory usage of SAMTOOLS_VIEW is negligible.
-        memory = { check_max( 6.GB * Math.ceil(meta2.genome_size / 1000000000) + 800.MB * log_increase_cpus(6, 6*task.attempt, meta.read_count/1000000000, 2), 'memory' ) }
+        memory = { check_max( 6.GB * Math.ceil(meta2.genome_size / 1000000000) + 800.MB * task.attempt * log_increase_cpus(6, 6*task.attempt, meta.read_count/1000000000, 2), 'memory' ) }
     }
 
     withName: MINIMAP2_ALIGN {
diff --git a/nextflow.config b/nextflow.config
index f9d5027..03de7e7 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -183,7 +183,7 @@ manifest {
     description     = 'Pipeline to map reads generated using different sequencing technologies against a genome assembly.'
     mainScript      = 'main.nf'
     nextflowVersion = '!>=22.10.1'
-    version         = '1.2.0'
+    version         = '1.2.1'
     doi             = '10.5281/zenodo.6563577'
 }
 
@@ -222,3 +222,30 @@ def check_max(obj, type) {
         }
     }
 }
+
+/*
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+    Increasing the number of CPUs often gives diminishing returns, so we increase it
+    following a logarithm curve. Example:
+        - 0 < value <= 1: start + step
+        - 1 < value <= 2: start + 2*step
+        - 2 < value <= 4: start + 3*step
+        - 4 < value <= 8: start + 4*step
+    In order to support re-runs, the step increase may be multiplied by the attempt
+    number prior to calling this function.
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+*/
+
+// Modified logarithm function that doesn't return negative numbers
+def positive_log(value, base) {
+    if (value <= 1) {
+        return 0
+    } else {
+        return Math.log(value)/Math.log(base)
+    }
+}
+
+def log_increase_cpus(start, step, value, base) {
+    return check_max(start + step * (1 + Math.ceil(positive_log(value, base))), 'cpus')
+}
+