# \#page-cache **URL:** https://community.neo4j.com/tag/page-cache/198.md [Latest](https://community.neo4j.com/latest.md) · [Categories](https://community.neo4j.com/categories.md) · [Tags](https://community.neo4j.com/tags.md) --- ## [Heap boundaries of Neo4J](https://community.neo4j.com/t/heap-boundaries-of-neo4j/25463)
**Author:** [@taleporos](https://community.neo4j.com/u/taleporos)\ **Replies:** 2\ **Last updated:** [September 21, 2020, 3:47pm UTC](https://community.neo4j.com/t/heap-boundaries-of-neo4j/25463 "2020-09-21T15:47:01Z")
Hello everyone, I am trying to measure the heap boundaries of Neo4J. I need to find the beginning/end address of the page cache. I need to find out, how Neo4j allocates the page cache. I am running LDBC benchmark suite… --- ## [Does count aggregation not use page cache?](https://community.neo4j.com/t/does-count-aggregation-not-use-page-cache/12338)
**Author:** [@shash](https://community.neo4j.com/u/shash)\ **Replies:** 9\ **Last updated:** [November 29, 2019, 9:43pm UTC](https://community.neo4j.com/t/does-count-aggregation-not-use-page-cache/12338 "2019-11-29T21:43:00Z")
Do aggregations not make use of page cache? I have a database with 4.6G of data, and 3.3G of indexes, the page cache is 10G, and is currently using 7.9G. My queries are showing millions of db hits, even after all the d… --- ## [Database Not Loading Into Pagecache](https://community.neo4j.com/t/database-not-loading-into-pagecache/12291)
**Author:** [@shash](https://community.neo4j.com/u/shash)\ **Replies:** 3\ **Last updated:** [November 29, 2019, 3:48am UTC](https://community.neo4j.com/t/database-not-loading-into-pagecache/12291 "2019-11-29T03:48:42Z")
tldr: Big neo4j dataset, trying to load into page cache. Only a part of the db being loaded. Queries with count very slow. Sysinfo and memrec showing different db data volumes. How to load the entire graph into memory, a… --- ## [Starting from a clean state in neo4j (caching)](https://community.neo4j.com/t/starting-from-a-clean-state-in-neo4j-caching/7558)
**Author:** [@cdzianisau](https://community.neo4j.com/u/cdzianisau)\ **Replies:** 0\ **Last updated:** [May 22, 2019, 8:48am UTC](https://community.neo4j.com/t/starting-from-a-clean-state-in-neo4j-caching/7558 "2019-05-22T08:48:55Z")
Hello, I hope I'm in the right category. My concern is about caching and requests. I'm using neo4j Community 3.5.3 with a 4 million cells and 35 million relationships database (generated from CSV) to run shortest path a… --- ## [Max Page Cache value not being respected](https://community.neo4j.com/t/max-page-cache-value-not-being-respected/6021)
**Author:** [@shweta](https://community.neo4j.com/u/shweta)\ **Replies:** 4\ **Last updated:** [April 10, 2019, 12:24am UTC](https://community.neo4j.com/t/max-page-cache-value-not-being-respected/6021 "2019-04-10T00:24:06Z")
Hi, We are facing issues with constantly growing neo4j memory, which ultimately crashes the server. We are running neo4j 3.4 in production on EC2 machine r4.8xlarge with linux OS. ( 32cores, 244 GB ram) Our DB is 2T in… --- ## [How to fix "Cannot close the PageCache while files are still mapped"](https://community.neo4j.com/t/how-to-fix-cannot-close-the-pagecache-while-files-are-still-mapped/291)
**Author:** [@david\_gordon1](https://community.neo4j.com/u/david_gordon1)\ **Replies:** 0\ **Last updated:** [August 23, 2018, 2:37am UTC](https://community.neo4j.com/t/how-to-fix-cannot-close-the-pagecache-while-files-are-still-mapped/291 "2018-08-23T02:37:11Z")
The most common cause of this error is incorrect file permissions on the store files. While testing it is common for folks to start the database as different users, this can leave store files owned by other user ids. (… --- ## [How to estimate initial memory configuration](https://community.neo4j.com/t/how-to-estimate-initial-memory-configuration/290)
**Author:** [@david\_gordon1](https://community.neo4j.com/u/david_gordon1)\ **Replies:** 0\ **Last updated:** [August 23, 2018, 2:37am UTC](https://community.neo4j.com/t/how-to-estimate-initial-memory-configuration/290 "2018-08-23T02:37:07Z")
The initial and eventual memory configuration parameters can be a moving target, based on how your store changes in size and how your workload increases or changes over time. This guidance is meant for the initial confi…