---
title: "A complete guide on DB2 v10 Virtual Storage Relief New addition"
description: "Prior to DB2 10, the primary constraint to vertical scalability was virtual storage below the 2 GB bar. DB2 V8 introduced 64-bit support for DB2 control blocks and data areas. DB2 9 for z/OS provided..."
url: https://srinimf.com/2015/12/07/a-complete-guide-on-db2-v10-virtual-storage-relief-new-addition/
date: 2015-12-07
modified: 2026-10-10
author: "Srini"
categories: ["Bigdata", "DB2", "DB2 V10"]
tags: ["DB2 v10 Virtual Storage Relief"]
type: post
lang: en
---

# A complete guide on DB2 v10 Virtual Storage Relief New addition

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Prior to DB2 10, the primary constraint to vertical scalability was virtual storage below the 2 GB bar. DB2 V8 introduced 64-bit support for DB2 [control blocks](https://srinimf.com/2015/09/15/top-features-of-ims-dc-mfs-control-blocks/) and data areas. DB2 9 for z/OS provided an additional10-15% relief for agent thread usage.

Related[DB2 Check Vs. Default Constraint Top Differences](https://srinimf.com/2021/10/30/db2-check-vs-default-constraint-top-differences/)

The DB2 10 for z/OS target is that up to 90% of the DBM1 address space and the distributed data facility (DDF) address space will be running above the bar. The result is the ability to run much more concurrent work in a single subsystem and to run from five to ten times more concurrent threads.

Related[Everything You Need to Know About DB2 Storage Areas](https://srinimf.com/2018/04/25/top-5-questions-to-get-clear-idea-on-db2-storage-area/)

For instance, if your configuration and application mix can support 500 concurrent threads on a single subsystem with DB2 9, you can support as many as 5000 concurrent threads on a single subsystem with DB2 10.

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