mirror of https://github.com/hashicorp/consul
19 lines
676 B
Markdown
19 lines
676 B
Markdown
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---
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layout: "docs"
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page_title: "Frequently Asked Questions"
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sidebar_current: "docs-faq"
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---
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# Frequently Asked Questions
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## Q: Why is virtual memory usage high?
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Consul makes use of [LMDB](http://symas.com/mdb/) internally for various data
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storage purposes. LMDB relies on using memory-mapping, a technique in which
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a sparse file is represented as a contiguous range of memory. Consul configures
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high limits for these file sizes, and as a result relies on a large chunks of
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virtual memory to be allocated. However, in practice the limits are much larger
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than any realistic deployment of Consul would ever use, and the resident memory or
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physical memory used is much lower.
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