Cherry pick #90770 to 25.11: Disable enable_shared_storage_snapshot_in_query (leads to memory leaks)#90800
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robot-ch-test-poll1 merged 3 commits intoNov 25, 2025
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Some functions stores a copy of `ContextPtr` (not a `weak_ptr` as it should be, but `shared_ptr`), i.e. [`modulo`](https://github.com/ClickHouse/ClickHouse/blob/407e33a47cf707155d1c4f3f12d2bb2291c80009/src/Functions/FunctionBinaryArithmetic.h#L827), but this `IFunction` itself can be stored in `KeyDescription`, which is part of `StorageInMemoryMetadata`. And with metadata cache (`enable_shared_storage_snapshot_in_query=1`) this will create memory leaks (since this `Context` will never be destroyed) As @Michicosun has been told, this cache should never be part of `Context` (but we abuse it often). (Another issue is `IFunction` holds a `ContextPtr` not a `ContextWeakPtr`, but this is another story) Anyway, let's disable it for now (backported to 25.11 is a must).
…pshot_in_query Disable enable_shared_storage_snapshot_in_query (leads to memory leaks)
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Original pull-request #90770
Do not merge this PR manually
This pull-request is a first step of an automated backporting.
It contains changes similar to calling
git cherry-picklocally.If you intend to continue backporting the changes, then resolve all conflicts if any.
Otherwise, if you do not want to backport them, then just close this pull-request.
The check results does not matter at this step - you can safely ignore them.
Troubleshooting
If the conflicts were resolved in a wrong way
If this cherry-pick PR is completely screwed by a wrong conflicts resolution, and you want to recreate it:
pr-cherrypicklabel from the PRYou also need to check the Original pull-request for
pr-backports-createdlabel, and delete if it's presented thereThe PR source
The PR is created in the CI job