tkalkirill commented on code in PR #791:
URL: https://github.com/apache/ignite-3/pull/791#discussion_r860945220
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modules/page-memory/src/main/java/org/apache/ignite/internal/pagememory/persistence/PageMemoryImpl.java:
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@@ -1598,4 +1727,327 @@ public interface PageChangeTracker {
*/
void apply(long page, FullPageId fullPageId, PageMemoryEx
pageMemoryEx);
}
+
+ /**
+ * Heuristic method which allows a thread to check if it is safe to start
memory structure modifications in regard with checkpointing.
+ * May return false-negative result during or after partition eviction.
+ *
+ * @return {@code False} if there are too many dirty pages and a thread
should wait for a checkpoint to begin.
+ */
+ public boolean safeToUpdate() {
+ if (segments != null) {
+ return safeToUpdate.get();
+ }
+
+ return true;
+ }
+
+ /**
+ * Returns number of pages used in checkpoint buffer.
+ */
+ public int usedCheckpointBufferPages() {
+ PagePool checkpointPool = this.checkpointPool;
Review Comment:
If PageMemoryImpl not started.
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