Odd flush behavior ------------------ Key: CASSANDRA-3203 URL: https://issues.apache.org/jira/browse/CASSANDRA-3203 Project: Cassandra Issue Type: Bug Components: Core Affects Versions: 1.0.0 Reporter: Brandon Williams Priority: Critical Fix For: 1.0.0
Given the same workload against 0.8, trunk is creating more than twice the amount of sstables. Even though a uniform stress workload is being generated, flush size degrades quickly: {noformat} INFO [NonPeriodicTasks:1] 2011-09-09 18:24:22,878 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@2058235391(7741 035/110172631 serialized/live bytes, 151785 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:24,888 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@1520390052(3887 220/72403158 serialized/live bytes, 76220 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:26,890 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@1868496516(4097 085/76255481 serialized/live bytes, 80335 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:28,893 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@498232521(43513 20/80922269 serialized/live bytes, 85320 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:29,895 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@1592308290(2310 810/44514839 serialized/live bytes, 45310 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:30,897 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@775439677(22684 80/64984390 serialized/live bytes, 44480 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:31,899 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@928217914(26741 85/76231422 serialized/live bytes, 52435 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:32,901 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@158103119(27511 95/77317732 serialized/live bytes, 53945 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:33,903 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@2035169258(3132 420/88934701 serialized/live bytes, 61420 ops) INFO [NonPeriodicTasks:1] 2011-09-09 18:24:34,905 ColumnFamilyStore.java (line 658) Enqueuing flush of Memtable-Standard1@1097314626(2979 675/83651699 serialized/live bytes, 58425 ops) {noformat} The serialized to live size ratio appears completely out of whack. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira