fix: reduce API test memory consumption from 8.26GB to 1.57GB (#8263) #9097
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…rse#8263) Addresses excessive memory usage in API tests that consumed >40GB virtual memory and >6GB resident memory, causing slower test execution. Root cause: Tests inherited production cache configurations (1GB local cache, 400MB SSTable cache) and ristretto's fixed 10M counter allocation created massive overhead for small test caches. Changes: - Set test-specific cache sizes (8MB local, 2MB SSTable) in serve_test.go - Scale ristretto counters adaptively based on cache capacity in eviction.go - Maintain full test functionality while reducing memory footprint by 81% Before: 8.26GB total allocation (6.7GB from ristretto caches) After: 1.57GB total allocation (50MB from ristretto caches) Tests: All controller tests pass with identical functionality
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Memory Optimization Fix for API Tests - Issue #8263
API tests were consuming excessive memory (>40 GiB virtual, >6 GiB resident), causing slower test execution and reduced developer adoption.
RCA
Memory Profile Findings (Before Optimization)
ristretto.newCmRow: 4.5 GB (54.42%)ristretto.Bloom.Size: 2.2 GB (27.21%)Root Cause
Default Production Configuration in Tests: Tests were using production-level cache sizes:
committed.local_cache.size_bytes: 1 GB (default)committed.sstable.memory.cache_size_bytes: 400 MB (default)Ristretto Cache Overhead: The ristretto cache allocates 10 million counters regardless of actual cache capacity, creating massive memory overhead for test environments.
Multiple Cache Instances: Each test creates two pyramid filesystem caches:
Test Repetition: 50+ controller tests each calling
setupHandler()with fresh cache instances.Results
Memory Allocation Improvement
Ristretto Cache Impact
Testing
Verification
Fixes #8263