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Incident report
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Resolution: Unresolved
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Trivial
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None
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None
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S25-W22/23, S25-W24/25
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0.125
Send 1 million values one by one to preprocessing manager for item without preprocessing and observe cumulative memory allocations are 2150 MB
Using local file ./sbin/zabbix_server. Using local file /tmp/pp_manager.0003.heap. Total: 2150.2 MB 1953.1 90.8% 90.8% 1953.1 90.8% zbx_vector_pp_task_ptr_reserve
Remove vector reservation for each value and observe cumulative memory usage decrease to 197 MB
Total: 197.0 MB 80.1 40.7% 40.7% 80.1 40.7% zbx_preprocessor_unpack_value 77.2 39.2% 79.9% 77.2 39.2% ipc_read_buffer
With preprocessing and error in JSONPath, before:
Total: 5520.4 MB 3064.9 55.5% 55.5% 3064.9 55.5% zbx_malloc2 2252.3 40.8% 96.3% 2252.3 40.8% zbx_realloc2 203.1 3.7% 100.0% 203.1 3.7% __GI___strdup 0.0 0.0% 100.0% 0.0 0.0% event_new 0.0 0.0% 100.0% 0.0 0.0% evsig_set_handler_ 0.0 0.0% 100.0% 0.0 0.0% event_add_nolock_
After:
google-pprof --alloc_space -text ./sbin/zabbix_server /tmp/pp_manager.0003.heap Using local file ./sbin/zabbix_server. Using local file /tmp/pp_manager.0003.heap. Total: 1299.8 MB 264.6 20.4% 20.4% 264.6 20.4% jsonpath_reserve 227.9 17.5% 37.9% 227.9 17.5% zbx_strncpy_alloc 195.7 15.1% 53.0% 195.7 15.1% __GI___strdup 195.7 15.1% 68.0% 195.7 15.1% zbx_snprintf_alloc 117.6 9.0% 77.1% 117.6 9.0% pp_task_create 77.2 5.9% 83.0% 77.2 5.9% ipc_read_buffer 77.2 5.9% 88.9% 77.2 5.9% zbx_preprocessor_unpack_value 36.8 2.8% 91.8% 957.5 73.7% pp_execute 29.4 2.3% 94.0% 29.4 2.3% list_create_item
Expected:
Should only allocate what is necessary
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- Elaborating
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