# Performance impact of high LS **URL:** \ **Category:** Forum\ **Tags:** Adabas-Natural, Adabas, Adabas-on-Mainframes, Adabas-Performance\ **Created:** [March 18, 2009, 5:47am UTC](https://techcommunity.softwareag.com/t/performance-impact-of-high-ls/80536 "2009-03-18T05:47:53Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [March 18, 2009, 5:47am UTC](https://techcommunity.softwareag.com/t/performance-impact-of-high-ls/80536/1 "2009-03-18T05:47:53Z")
Hi, I increased the LS from 120,000 to around 3 million (according to calculations in the manual, around 16 million would have been ideal, but I wanted to size it such that it would fit within the LWP (Work Pool) as a trial increase first). This seems to have caused a huge performance problem with S1/4 commands - probably because it took more Work Pool than I had anticipated. I then resized it to 1 million online, and refreshed the work pool high water mark, and could see that it was now using only 70% of LWP. Performance improved, but it still not as good as it had been with an LS of 120,000. I can understand a performance impact when LWP was not sufficient, but could an increase in LS from 120,000 to 1,000,000 cause a performance degradation even if there is plenty of LWP available? Frances ---
**Author:** ![system](https://global.discourse-cdn.com/techcommunity/original/3X/c/d/cd19967bb605d28a72d77eb83a1cae22f3df2eb8.svg) [@system](https://techcommunity.softwareag.com/u/system)\ **Post date:** [April 2, 2021, 2:51pm UTC](https://techcommunity.softwareag.com/t/performance-impact-of-high-ls/80536/2 "2021-04-02T14:51:41Z")