[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Status: Patch Available (was: Open)
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch, HBASE-18019.v1.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
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[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Attachment: HBASE-18019.v1.patch
v1 --
# change the initial capacity of memStoreScannersAfterFlush from 2 to 3
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch, HBASE-18019.v1.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
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[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Status: Open (was: Patch Available)
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
--
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(v6.3.15#6346)
[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Status: Patch Available (was: Open)
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
--
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(v6.3.15#6346)
[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Attachment: HBASE-18019.v0.patch
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
> Attachments: HBASE-18019.v0.patch
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
--
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(v6.3.15#6346)
[jira] [Updated] (HBASE-18019) Clear redundant memstore scanners
[
https://issues.apache.org/jira/browse/HBASE-18019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chia-Ping Tsai updated HBASE-18019:
---
Summary: Clear redundant memstore scanners (was: Clear redundant memstore
scanner)
> Clear redundant memstore scanners
> -
>
> Key: HBASE-18019
> URL: https://issues.apache.org/jira/browse/HBASE-18019
> Project: HBase
> Issue Type: Improvement
>Affects Versions: 2.0.0
>Reporter: Chia-Ping Tsai
>Assignee: Chia-Ping Tsai
> Fix For: 2.0.0
>
>
> The HBASE-17655 remove the MemStoreScanner and it causes that the
> MemStore#getScanner(readpt) returns multi KeyValueScanner which consist of
> active, snapshot and pipeline. But StoreScanner only remove one mem scanner
> when refreshing current scanners.
> {code}
> for (int i = 0; i < currentScanners.size(); i++) {
> if (!currentScanners.get(i).isFileScanner()) {
> currentScanners.remove(i);
> break;
> }
> }
> {code}
> The older scanners kept in the StoreScanner will hinder GC from releasing
> memory and lead to multiple scans on the same data.
>
--
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(v6.3.15#6346)
