[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Fix Version/s: 1.2.19 > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump >Priority: Minor > Fix For: 1.2.19 > > Attachments: 7938.txt > > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Priority: Minor (was: Major) > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump >Priority: Minor > Attachments: 7938.txt > > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Fix Version/s: (was: 1.2.19) > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump > Attachments: 7938.txt > > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Attachment: 7938.txt Patch to ignore fadvise calls with -Dcassandra.ignore.fadvise=true > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump > Fix For: 1.2.19 > > Attachments: 7938.txt > > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Fix Version/s: 1.2.19 > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump > Fix For: 1.2.19 > > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Matt Stump updated CASSANDRA-7938: -- Summary: Releases prior to 2.0 gratuitously invalidate buffer cache (was: Releases prior to 2.1 gratuitously invalidate buffer cache) > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.1. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
[jira] [Updated] (CASSANDRA-7938) Releases prior to 2.0 gratuitously invalidate buffer cache
[ https://issues.apache.org/jira/browse/CASSANDRA-7938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] T Jake Luciani updated CASSANDRA-7938: -- Description: RandomAccessReader gratuitously invalidates the buffer cache in releases prior to 2.0. Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the invalidated pages as captured by CPU flame graphs. fadvise DONT_NEED should never be called for files other than the commit log segments. https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 was: RandomAccessReader gratuitously invalidates the buffer cache in releases prior to 2.1. Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the invalidated pages as captured by CPU flame graphs. fadvise DONT_NEED should never be called for files other than the commit log segments. https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 > Releases prior to 2.0 gratuitously invalidate buffer cache > -- > > Key: CASSANDRA-7938 > URL: https://issues.apache.org/jira/browse/CASSANDRA-7938 > Project: Cassandra > Issue Type: Bug > Components: Core >Reporter: Matt Stump > > RandomAccessReader gratuitously invalidates the buffer cache in releases > prior to 2.0. > Additionally, Linux 3.X kernels spend 30% of CPU time in book keeping for the > invalidated pages as captured by CPU flame graphs. > fadvise DONT_NEED should never be called for files other than the commit log > segments. > https://github.com/apache/cassandra/blob/cassandra-2.1/src/java/org/apache/cassandra/io/util/RandomAccessReader.java#L168 -- This message was sent by Atlassian JIRA (v6.3.4#6332)
