[opt](cloud) Support cached cloud partition version for high frequency query #50439
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TPC-H: Total hot run time: 34544 ms |
TPC-DS: Total hot run time: 193061 ms |
ClickBench: Total hot run time: 29.86 s |
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TPC-H: Total hot run time: 34065 ms |
TPC-DS: Total hot run time: 192107 ms |
ClickBench: Total hot run time: 29.2 s |
TangSiyang2001
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May 6, 2025
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TPC-H: Total hot run time: 33852 ms |
TPC-DS: Total hot run time: 190995 ms |
ClickBench: Total hot run time: 29.5 s |
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…y query (#50439) Support new session variable to get rid of frequent get_version request to meta-service. set `cloud_partition_version_cache_ttl_ms` with a suitable value as needed, it means a partition's version may be cached on FE at most X milliseconds. pro: reduce RPC/IO to meta-service and fdb, increase query throughput and reduce query latency (plan phase) con: visibility may be delayed when doing point query; data consistency (snapshot) may be broken when doing query wi involved multiple partitions and there is continuous data import;
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Jun 4, 2025
…y query (apache#50439) Support new session variable to get rid of frequent get_version request to meta-service. set `cloud_partition_version_cache_ttl_ms` with a suitable value as needed, it means a partition's version may be cached on FE at most X milliseconds. pro: reduce RPC/IO to meta-service and fdb, increase query throughput and reduce query latency (plan phase) con: visibility may be delayed when doing point query; data consistency (snapshot) may be broken when doing query wi involved multiple partitions and there is continuous data import;
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What problem does this PR solve?
Support new session variable to get rid of frequent get_version request to meta-service.
set
cloud_partition_version_cache_ttl_mswith a suitable value as needed, it means a partition's version may be cached on FE at most X milliseconds.pro: reduce RPC/IO to meta-service and fdb, increase query throughput and reduce query latency (plan phase)
con: visibility may be delayed when doing point query; data consistency (snapshot) may be broken when doing query wi involved multiple partitions and there is continuous data import;
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