diff --git a/changelogs/fragments/1079-redis-use-regexp-to-check-if-the-value-matches-expected-form.yaml b/changelogs/fragments/1079-redis-use-regexp-to-check-if-the-value-matches-expected-form.yaml
new file mode 100644
index 0000000000..27d01de91d
--- /dev/null
+++ b/changelogs/fragments/1079-redis-use-regexp-to-check-if-the-value-matches-expected-form.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - redis - fixes parsing of config values which should not be converted to bytes (https://github.com/ansible-collections/community.general/pull/1079).
diff --git a/plugins/modules/database/misc/redis.py b/plugins/modules/database/misc/redis.py
index 60ac88a0d5..8207e184a2 100644
--- a/plugins/modules/database/misc/redis.py
+++ b/plugins/modules/database/misc/redis.py
@@ -131,6 +131,7 @@ else:
 from ansible.module_utils.basic import AnsibleModule, missing_required_lib
 from ansible.module_utils.common.text.formatters import human_to_bytes
 from ansible.module_utils._text import to_native
+import re
 
 
 # Redis module specific support methods.
@@ -277,7 +278,10 @@ def main():
         name = module.params['name']
 
         try:  # try to parse the value as if it were the memory size
-            value = str(human_to_bytes(module.params['value'].upper()))
+            if re.match(r'^\s*(\d*\.?\d*)\s*([A-Za-z]+)?\s*$', module.params['value'].upper()):
+                value = str(human_to_bytes(module.params['value'].upper()))
+            else:
+                value = module.params['value']
         except ValueError:
             value = module.params['value']