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Pavel Baranov commented on CASSANDRA-8530: ------------------------------------------ Tom, we decided to restructure our tables and not use secondary indexes at all (feedback from Datastax). It's been working great so far. - Pavel > Query on a secondary index creates huge CPU spike + unable to trace > ------------------------------------------------------------------- > > Key: CASSANDRA-8530 > URL: https://issues.apache.org/jira/browse/CASSANDRA-8530 > Project: Cassandra > Issue Type: Bug > Components: API, Core > Environment: CentOs 6.5 / Cassandra 2.1.2 > Reporter: Pavel Baranov > > After upgrading cassandra from 2.0.10 to 2.1.2 we are having all kinds of > issues, especially with performance. > java version "1.7.0_65" > Table creation: > {noformat} > tweets> desc table tweets; > CREATE TABLE tweets.tweets ( > uname text, > tweet_id bigint, > tweet text, > tweet_date timestamp, > tweet_date_only text, > uid bigint, > PRIMARY KEY (uname, tweet_id) > ) WITH CLUSTERING ORDER BY (tweet_id ASC) > AND bloom_filter_fp_chance = 0.01 > AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}' > AND comment = '' > AND compaction = {'min_threshold': '10', 'class': > 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', > 'max_threshold': '32'} > AND compression = {'sstable_compression': > 'org.apache.cassandra.io.compress.LZ4Compressor'} > AND dclocal_read_repair_chance = 0.0 > AND default_time_to_live = 0 > AND gc_grace_seconds = 864000 > AND max_index_interval = 2048 > AND memtable_flush_period_in_ms = 0 > AND min_index_interval = 128 > AND read_repair_chance = 0.1 > AND speculative_retry = '99.0PERCENTILE'; > CREATE INDEX tweets_tweet_date_only_idx ON tweets.tweets (tweet_date_only); > CREATE INDEX tweets_uid ON tweets.tweets (uid); > {noformat} > With Cassandra 2.0.10 this query: > {noformat} > select uname from tweets where uid = 636732672 limit 1; > {noformat} > did not have any issues. After upgrade, I can see the cpu spikes and load avg > goes from ~1 to ~13, especially if I execute the query over and over again. > Doing "tracing on" does not work and just returns: > "Statement trace did not complete within 10 seconds" > I've done: > nodetool upgradesstables > recreated indexes -- This message was sent by Atlassian JIRA (v6.3.4#6332)