sync to 1.2: remove the old fast ranges and update metrics

[gouhongshen]

What type of PR is this?

• API-change
• BUG
• Improvement
• Documentation
• Feature
• Test and CI
• Code Refactoring

Which issue(s) this PR fixes:

issue ##16146

What this PR does / why we need it:

1. remove the old fast path
2. check the pushed-down composite primary key serialization.
3. update ranges metrics.

[matrix-meow]

@gouhongshen Thanks for your contributions!

Here are review comments for file pkg/util/metric/v2/dashboard/grafana_dashboard_txn.go:

Pull Request Review:

Title:

The title of the pull request is clear and concise, indicating that the changes are related to syncing to version 1.2, removing old fast ranges, and updating metrics.

Body:

The body of the pull request provides information on the type of PR, the related issue, and a brief overview of the changes made in the PR. It mentions the removal of the old fast path, checking pushed-down composite primary key serialization, and updating range metrics. The body could be improved by providing more detailed explanations of the changes and their significance.

Changes in pkg/util/metric/v2/dashboard/grafana_dashboard_txn.go:

1. Removed Fast Ranges Row:

   • The initFastRangesRow() function has been removed, which indicates the removal of the fast ranges metrics from the dashboard.
   • Issue: Removing functionality without a clear explanation may lead to confusion or loss of important metrics.
   • Suggestion: If the fast ranges metrics are no longer relevant, consider adding a comment explaining the reason for their removal.

2. Changes in initTxnTableRangesRow() Function:

   • The function name has been changed to initTxnTableRangesRow().
   • The metric name has been updated to "Txn Table Ranges Duration".
   • Optimization: The function name change seems appropriate for better clarity.

3. New initTxnRangesSelectivityRow() Function:

   • A new function initTxnRangesSelectivityRow() has been added to replace the removed initFastRangesRow().
   • It includes multiple histograms for different types of selectivity metrics.
   • Issue: The new function seems to combine multiple metrics, which may make it harder to analyze specific selectivity types.
   • Suggestion: Consider splitting the selectivity metrics into separate functions for better organization and clarity.

4. Changes in initTxnRangesCountRow() Function:

   • The function name has been changed to initTxnRangesCountRow().
   • The metric name has been updated to "Ranges Count".
   • Optimization: The function name change aligns with the metric being measured.

5. Removed initTxnRangesLoadedObjectMetaRow() Function:

   • The initTxnRangesLoadedObjectMetaRow() function has been removed.
   • Issue: The removal of this function may impact monitoring of loaded object metadata.
   • Suggestion: If the loaded object metadata is still relevant, consider re-implementing or explaining the reason for its removal.

Overall Suggestions for Improvement:

• Provide more detailed comments or documentation explaining the rationale behind each change.
• Consider breaking down complex metrics into separate functions for better maintainability.
• Ensure that the removal of metrics or functionality is justified and clearly communicated in comments or documentation.

By addressing the issues mentioned above and considering the suggestions for optimization, the pull request can be enhanced for better clarity, maintainability, and understanding of the changes made.

Here are review comments for file pkg/util/metric/v2/metrics.go:

Pull Request Review:

Title:

The title of the pull request is clear and concise, indicating that the changes are related to syncing to version 1.2, removing old fast ranges, and updating metrics.

Body:

The body of the pull request provides some context on the changes made, mentioning the removal of the old fast path, checking the pushed-down composite primary key serialization, and updating range metrics. It also references the related issue #16146.

Changes in pkg/util/metric/v2/metrics.go:

1. Removed txnTableRangeSizeHistogram and Added txnTableRangeTotalHistogram:

   • The change involves removing the txnTableRangeSizeHistogram registration and adding txnTableRangeTotalHistogram registration. This seems like a straightforward replacement or renaming of the metric.
   • Suggestion: Ensure that the new txnTableRangeTotalHistogram accurately represents the intended metric and that any usage of the old metric is appropriately updated throughout the codebase.

2. Removed TxnRangesLoadedObjectMetaTotalCounter:

   • The TxnRangesLoadedObjectMetaTotalCounter registration has been removed in this change.
   • Issue: It's important to verify if this removal is intentional and won't impact any functionality or monitoring that relies on this counter.
   • Suggestion: If this counter is no longer needed, ensure that there are no dependencies on it and that its removal does not affect any other parts of the codebase.

3. Updated txnCNCommittedLocationQuantityGauge:

   • The txnCNCommittedLocationQuantityGauge registration seems to remain unchanged in this pull request.
   • Optimization: Since this gauge is not directly related to the mentioned changes, consider separating unrelated changes to keep the pull request focused.

4. Miscellaneous:

   • Ensure that the changes made align with the purpose of syncing to version 1.2 and updating metrics as mentioned in the pull request description.
   • It would be beneficial to have more detailed comments or explanations in the code regarding the purpose of each metric and its usage.

Overall Suggestions:

• Double-check the impact of removing TxnRangesLoadedObjectMetaTotalCounter and ensure it won't cause any issues.
• Confirm that the new txnTableRangeTotalHistogram accurately reflects the intended metric.
• Consider separating unrelated changes to maintain clarity and focus in the pull request.
• Add or update comments in the code to explain the purpose and usage of metrics for better maintainability.

By addressing these points, the pull request can be optimized for clarity, correctness, and maintainability in the codebase.

Here are review comments for file pkg/util/metric/v2/txn.go:

Pull Request Review:

Title:

The title of the pull request is clear and concise, indicating that the changes are related to syncing to version 1.2, removing old fast ranges, and updating metrics.

Body:

The body of the pull request provides information on the type of PR, the related issue, and a brief description of the changes made, including removing the old fast path, checking pushed-down composite primary key serialization, and updating range metrics. It would be beneficial to include more detailed information about the specific changes for better context.

Changes in pkg/util/metric/v2/txn.go:

1. Removed Code:

   • The removal of TxnRangesLoadedObjectMetaTotalCounter is mentioned in the body but not reflected in the diff. Ensure that the removal is correctly implemented.

2. Histogram Updates:

   • Renamed txnTableRangeSizeHistogram to txnTableRangeTotalHistogram and adjusted the name and help text accordingly. This change seems appropriate.
   • Added new histograms for different types of selected block counts, which seems like a good addition for more detailed metrics.
   • Renamed and added new histograms for slow and fast path selected block counts and load object counts. This separation can provide more granular insights into performance.
   • Updated histogram labels and values for better clarity and distinction between slow and fast path metrics.
   • Adjusted the buckets for histograms to ExponentialBuckets for improved data distribution.

3. Histogram Labels:

   • Added new histogram labels for different types of selectivity percentages. This can help in analyzing performance characteristics more precisely.
   • Renamed and added new histogram labels for slow and fast path block and object selectivity. This differentiation can enhance the understanding of selectivity metrics.

Suggestions for Improvement:

1. Ensure Removal of Code:

   • Confirm that the TxnRangesLoadedObjectMetaTotalCounter is correctly removed as intended.

2. Consistency in Naming:

   • Ensure consistent naming conventions for histograms and labels to maintain clarity and coherence across metrics.

3. Detailed Descriptions:

   • Provide more detailed descriptions in the PR body to explain the rationale behind each change and its impact on the codebase.

4. Optimization:

   • Consider consolidating similar histograms or labels to reduce redundancy and improve maintainability.

5. Documentation:

   • Update relevant documentation or comments to reflect the changes made in the metrics for better code understanding.

6. Testing:

   • Verify that the changes do not introduce any regressions by running appropriate tests related to metrics collection and reporting.

By addressing the mentioned points and ensuring consistency and clarity in the changes, the pull request can be enhanced for better code quality and maintainability.

Here are review comments for file pkg/vm/engine/disttae/filter.go:

Pull Request Review:

Title:

The title of the pull request is clear and concise, indicating that the changes are related to syncing to version 1.2, removing old fast ranges, and updating metrics.

Body:

The body of the pull request provides information about the type of PR, the related issue, and a brief overview of the changes made, including removing the old fast path, checking pushed-down composite primary key serialization, and updating range metrics. It would be beneficial to include more detailed information about the specific changes and their impact.

Changes in pkg/vm/engine/disttae/filter.go:

1. Addition of Metrics Tracking:

   • Several new variables have been added to track metrics related to different operations within the ExecuteBlockFilter function.
   • Metrics are being observed and recorded using functions from the v2 package.
   • Metrics like loadHit, objFilterHit, blkFilterHit, and fastFilterHit are being incremented based on certain conditions being met during the execution.

2. Potential Issue - Incomplete Metric Tracking:

   • The totalBlocks variable is being incremented to track the total number of blocks, but the calculation seems to be incorrect as it is incrementing by the number of blocks in each object. This might lead to inaccurate metrics.
   • The calculation for v2.TxnRangesFastPathBlkTotalSelectivityHistogram might not be capturing the correct selectivity as it is dividing by totalBlocks which is not the total number of blocks in the context of the operation.

3. Code Optimization:

   • The use of defer for recording metrics at the end of the function is a good practice to ensure metrics are always captured before exiting the function.
   • The addition of metrics tracking enhances observability and performance monitoring.

Suggestions for Improvement:

1. Correct Total Blocks Calculation:

   • Ensure that totalBlocks tracks the correct total number of blocks across all objects to provide accurate metrics.
   • Adjust the calculation for v2.TxnRangesFastPathBlkTotalSelectivityHistogram to reflect the correct selectivity based on the total number of blocks processed.

2. Enhance Metric Clarity:

   • Consider adding comments or documentation to explain the purpose and significance of each metric being tracked for better understanding and maintenance.
   • Validate the accuracy and relevance of each metric being recorded to ensure they provide meaningful insights.

3. Review and Test:

   • Thoroughly review the changes to ensure all metrics are correctly implemented and provide valuable data for monitoring and optimization.
   • Test the functionality to verify that the metrics are being captured accurately and reflect the expected behavior.

By addressing the issues mentioned above and considering the suggestions for improvement, the codebase can be enhanced in terms of accuracy, performance monitoring, and maintainability.

Here are review comments for file pkg/vm/engine/disttae/reader.go:

Pull Request Review:

Title and Body:

The title of the pull request is clear, indicating that the changes are related to syncing to version 1.2, removing old fast ranges, and updating metrics. The body of the pull request provides a brief overview of the changes made, mentioning the removal of the old fast path, checking the pushed-down composite primary key serialization, and updating range metrics. It also references the related issue #16146.

Changes in pkg/vm/engine/disttae/reader.go:

1. Code Removal:

   • The code removal related to the old fast path and composite primary key handling seems appropriate.
   • The removal of the getCompositPKFilter function and associated logic is in line with the goal of removing the old fast path.

2. Code Refactoring:

   • The refactoring of the getNonCompositPKFilter function signature to have parameters on separate lines for better readability is a good practice.

3. Potential Issue:

   • In the getReadFilter function, the condition if mixin.filterState.expr == nil || pk == nil might need further review. Depending on the logic flow and requirements, it's essential to ensure that the conditions are correctly handled to avoid any unintended behavior.

4. Optimization:

   • Consider optimizing the code further by removing any redundant or unused variables, comments, or code blocks to improve code readability and maintainability.

5. Security Concern:

   • While the changes seem focused on functionality and performance, it's crucial to ensure that any sensitive data or operations related to security are handled securely. Review the code to check for any potential security vulnerabilities, especially when dealing with primary keys or filtering mechanisms.

Suggestions for Improvement:

1. Clarify Logic:

   • Ensure that the logic for handling composite primary keys and filters is clear and well-documented to aid in understanding and maintenance.

2. Testing:

   • Consider adding or updating relevant tests to cover the changes made in this pull request to maintain code reliability and prevent regressions.

3. Consistency:

   • Maintain consistency in coding style and formatting throughout the file to enhance code readability and collaboration.

4. Documentation:

   • Provide inline comments or documentation where necessary to explain the purpose of functions, variables, or complex logic for better code comprehension.

5. Performance:

   • Continuously monitor the performance impact of the changes and optimize the code further if needed to ensure efficient execution.

In conclusion, while the pull request addresses the removal of old fast ranges and updates metrics, it's essential to review the logic, address potential issues, optimize the code, and ensure security considerations are taken into account. By incorporating the suggestions mentioned above, the codebase can be enhanced in terms of functionality, readability, and maintainability.

[mergify]

⚠️ The sha of the head commit of this PR conflicts with #16440. Mergify cannot evaluate rules on this PR. ⚠️