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https://issues.apache.org/jira/browse/CASSANDRA-8248?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14214961#comment-14214961
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Shawn Kumar commented on CASSANDRA-8248:
----------------------------------------
Alex, have you determined the issue with resident being larger, and are you
still seeing this problem? If there are any further details you can provide
(are you carrying out incremental repairs? do compactions have any affect?),
they would be much appreciated.
> Possible memory leak
> ---------------------
>
> Key: CASSANDRA-8248
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8248
> Project: Cassandra
> Issue Type: Bug
> Reporter: Alexander Sterligov
> Assignee: Shawn Kumar
> Attachments: thread_dump
>
>
> Sometimes during repair cassandra starts to consume more memory than expected.
> Total amount of data on node is about 20GB.
> Size of the data directory is 66GC because of snapshots.
> Top reports:
> {noformat}
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 15724 loadbase 20 0 493g 55g 44g S 28 44.2 4043:24 java
> {noformat}
> At the /proc/15724/maps there are a lot of deleted file maps
> {quote}
> 7f63a6102000-7f63a6332000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a6332000-7f63a6562000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a6562000-7f63a6792000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a6792000-7f63a69c2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a69c2000-7f63a6bf2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a6bf2000-7f63a6e22000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a6e22000-7f63a7052000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7052000-7f63a7282000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7282000-7f63a74b2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a74b2000-7f63a76e2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a76e2000-7f63a7912000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7912000-7f63a7b42000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7b42000-7f63a7d72000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7d72000-7f63a7fa2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a7fa2000-7f63a81d2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a81d2000-7f63a8402000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8402000-7f63a8622000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8622000-7f63a8842000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8842000-7f63a8a62000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8a62000-7f63a8c82000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8c82000-7f63a8ea2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a8ea2000-7f63a90c2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> 7f63a90c2000-7f63a92e2000 r--s 00000000 08:21 9442763
> /ssd/cassandra/data/iss/feedback_history-d32bc7e048c011e49b989bc3e8a5a440/iss-feedback_history-tmplink-ka-328671-Index.db
> (deleted)
> {quote}
> {quote}
> $ sudo grep deleted /proc/15724/maps | wc -l
> 640118
> {quote}
> {quote}
> $ sudo grep -v deleted /proc/15724/maps | wc -l
> 303340
> {quote}
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