Memgraph 3.9

[gitbuda]

This is the main release branch for Memgraph 3.9 (NOTE: mage repo was archived, that's the reason for linking only the memgraph milestone, the relevant mage PRs that happened before the merge are already linked below)

make sure to do:

• Update sitemap #1531 (this was 3.8)
• Update direct download links #1532 (this was 3.8)

Memgraph PRs Docs Needed

memgraph https://github.com/memgraph/memgraph/milestone/43

• Create vector index using functions memgraph#3801 -> Create vector index using functions #1555 @DavIvek
• Embeddings memory tracking memgraph#3847 + Rename embeddings_memory to vector_index_memory memgraph#3863 -> Add vector index memory tracking #1556 @DavIvek
• Allow --storage-access-timeout-sec runtime updates memgraph#3882 -> Update storage access timeout flag info (now a run-time flag) #1554 @andrejtonev
• Improve license logic and error handling memgraph#3859 -> License logic update #1553 @andrejtonev
• fix: Persist user/role details across license changes memgraph#3867 -> Explain updating enterprise users from community build discards user's enterprise auth details #1551 @colinbarry
• feat: Add configuration flag --log-retention-days memgraph#3862 -> feat: Add docs for log retention days #1550 @as51340
• feat: Add support for asynchronous logging  memgraph#3844 -> feat: Add docs for async logs #1549 @as51340
• Add global server side parameters store memgraph#3717 -> Add server side parameters docs #1546 @DavIvek
• Expand SHOW TRANSACTIONS to list transaction status and snapshots in progress memgraph#3833 -> SHOW TRANSACTIONS update #1545 @andrejtonev
• Memory optimization: Allow user to specify float property precision memgraph#3817 -> PropertyStore float precision #1541 @andrejtonev
• Memory optimization: Pack boolean values under delta pointer memgraph#3814 -> Vertex/Edge size update #1540 @andrejtonev
• feat: Add coordinator setting deltas_batch_progress_size memgraph#3797 -> feat: Add coordinator setting deltas_batch_progress_size #1538 @as51340
• feat: Coordinator request forwarding memgraph#3750 -> feat: Coordinator request forwarding #1535 @as51340

helm-charts

• feat: Add support for custom volumes and volume mounts in HA chart helm-charts#201 -> feat: Add support for HA volumes #1539
• feat: Upload core dumps to S3 storage helm-charts#202 -> feat: S3 core dumps #1542 @as51340
• feat: Add a script for debugging Memgraph using ephemeral containers helm-charts#203 -> docs: Add section on using GDB in Memgraph Helm charts #1544 @as51340
• feat: Added script for profiling Memgraph in K8s helm-charts#204 -> docs: Add section on profiling in Memgraph #1543 @as51340

prometheus-exporter

• Add Memgraph dashboard example prometheus-exporter#30 -> Added Memgraph dashboard to Prometheus stack #1537 @mattkjames7

Release Notes Required

memgraph https://github.com/memgraph/memgraph/milestone/43

• Add global server side parameters store memgraph#3717 @DavIvek
• fix: Cost model for BFS algorithm + index lookup memgraph#3751 @imilinovic
• fix: cannot set property with name schema.assert memgraph#3772 @imilinovic
• fix: Install deps for running driver tests on ARM memgraph#3776 @colinbarry
• refactor: better error messages on storage access timeout memgraph#3778 @imilinovic
• feat: Add coordinator setting deltas_batch_progress_size memgraph#3797 @as51340
• WAL recovery and replication speed up. memgraph#3799 @andrejtonev
• Create vector index using functions memgraph#3801 @DavIvek
• Fix startup recovery to restore databases as system metadata memgraph#3807 @DavIvek
• Memory optimization: Pack boolean values under delta pointer memgraph#3814 @andrejtonev
• Bugfix: DistinctParallelCursor inconsistent ordering memgraph#3815 @andrejtonev
• Memory optimization: Allow user to specify float property precision memgraph#3817 @andrejtonev
• fix: cache bfs operator memgraph#3821 @imilinovic
• feat: Abort periodic snapshot on destruction when snapshot on exit is false memgraph#3823 @as51340
• Expand SHOW TRANSACTIONS to list transaction status and snapshots in progress memgraph#3833 @andrejtonev
• fix: Prevent double processing concurrent edge deltas in HA replication memgraph#3836 @colinbarry
• fix: Ensure GIL is taken before destroying Object memgraph#3837 @as51340
• fix: Handle delta chain abort modifications in concurrent edge durability memgraph#3839 @colinbarry
• Fix: Python module close can segfault on shutdown memgraph#3842 @andrejtonev
• feat: Add support for asynchronous logging  memgraph#3844 @as51340
• Fix segfault in VectorIndex::RemoveObsoleteEntries during concurrent adds memgraph#3846 @DavIvek
• Embeddings memory tracking memgraph#3847 @DavIvek
• fix: Data race in coordinator state manager memgraph#3850 @as51340
• fix: Signal unsafe async calls in the shutdown handler memgraph#3851 @as51340
• fix: Concurrent workloads on vector indices memgraph#3856 @as51340
• Improve license logic and error handling memgraph#3859 @andrejtonev
• feat: Add configuration flag --log-retention-days memgraph#3862 @as51340
• Rename embeddings_memory to vector_index_memory memgraph#3863 @DavIvek
• Fix: python fragile if memory limit exceeded memgraph#3864 @andrejtonev
• fix: Persist user/role details across license changes memgraph#3867 @colinbarry
• Fix: Periodic commit safe abort memgraph#3868 @andrejtonev
• fix: scoping issues with in CALL + UNION memgraph#3869 @imilinovic
• fix: Update schema info when triggers update labels memgraph#3870 @colinbarry
• fix: Handle locking correctly when indexed vertices have concurrently imported edges memgraph#3871 @colinbarry
• Fix: missing type checks cause communication to unexpectedly fail memgraph#3873 @andrejtonev
• fix: schema module not working with ZonedDateTime data type memgraph#3874 @imilinovic
• Fix: Parallel DISTINCT frame swap causes failure in other cursors memgraph#3876 @andrejtonev
• Fix: Remove edges from text index on detach delete memgraph#3878 @DavIvek
• Allow --storage-access-timeout-sec runtime updates memgraph#3882 @andrejtonev
• fix: Add error message when loading SSL files memgraph#3795 @as51340

TODO(@gitbuda): Write a skill that will do all the changelog (read from GitHub milestone, cross-check against main, update the docs page, put a checkbox here).

• Added check-before-release skill

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Project	Deployment	Actions	Updated (UTC)
documentation	Ready	Preview, Comment	Mar 12, 2026 8:43am