github-actions[bot] commented on code in PR #66717:
URL: https://github.com/apache/doris/pull/66717#discussion_r3775088142
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fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalCatalog.java:
##########
@@ -1367,9 +1381,21 @@ public int hashCode() {
public void notifyPropertiesUpdated(Map<String, String> updatedProps) {
CatalogIf.super.notifyPropertiesUpdated(updatedProps);
String schemaCacheTtl =
updatedProps.getOrDefault(SCHEMA_CACHE_TTL_SECOND, null);
- if (java.util.Objects.nonNull(schemaCacheTtl)) {
- ExternalMetaCacheMgr extMetaCacheMgr =
Env.getCurrentEnv().getExtMetaCacheMgr();
+ ExternalMetaCacheMgr extMetaCacheMgr =
Env.getCurrentEnv().getExtMetaCacheMgr();
Review Comment:
[P1] Fence this new quota invalidation against an in-flight first
initialization. `prepareCatalogByEngine()` can copy the old properties while no
group exists; if ALTER commits this setting next, `removeCatalog()` skips the
absent group, and the delayed initializer then publishes the old count-only
policy indefinitely. That silently defeats the configured memory bound. Please
version/serialize the property snapshot with removal and publication, and add a
paused ALTER-vs-init test that verifies the new weighted policy wins.
##########
fe/fe-core/src/main/java/org/apache/doris/datasource/paimon/PaimonExternalMetaCache.java:
##########
@@ -86,7 +100,14 @@ public Table getPaimonTable(NameMapping nameMapping) {
public PaimonSnapshotCacheValue getSnapshotCache(ExternalTable dorisTable)
{
NameMapping nameMapping = dorisTable.getOrBuildNameMapping();
- return
tableEntry.get(nameMapping.getCtlId()).get(nameMapping).getLatestSnapshotCacheValue();
+ PaimonTableCacheValue tableValue =
tableEntry.get(nameMapping.getCtlId()).get(nameMapping);
Review Comment:
[P2] Avoid resolving the remote fence before every snapshot-cache lookup.
`loadFence()` runs before `snapshotEntry.get()`, and its path calls
`copyWithLatestSchema()`, `latestSnapshot()`, and `schemaManager().latest()`,
so even a hit on an admitted snapshot still performs latest-metadata discovery.
Before this change, `PaimonTableCacheValue` memoized the projection, so stable
repeated reads avoided that work. Please retain or refresh the fence under the
table generation (or otherwise put discovery behind a cache) and add a
repeated-hit call-count test.
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