How do I clean up Hana logs?

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  1. stop the database.
  2. move few of the log segments to new location and create the soft link.
  3. start the database.
  4. check the status of the log segments.
  5. select status from m_log_segments.
  6. if the status of the log segments is ‘free’ then execute ‘alter system reclaim log’ to clear the space.

What does HANA cleaner do?

The SAP HANA cleaner is a house keeping script for SAP HANA. It can be used to clean the backup catalog, diagnostic files, alerts, to compress the backup logs, and much more. It should be executed by adm or, in case you use a CRON job, with the same environment as the adm.

What is stored in HANA log?

The SAP HANA system logs all the transactions that change application data or the database catalog in log entries and stores them in log area. It uses these log entries in log area to roll back or repeat SQL statements.

Where are SAP HANA logs?

HANA LOG and TRACE files are located under /usr/sap/< SID >/HDB< Instance number >/< hostname >/trace directory. If you are using multitenant structure, then this directory shows SYSTEMDB and you can find TENANT logs and trace files under own directory (DB_SID).

How do I reclaim space in HANA?

How to reclaim fragmented space at OS level from HANA Data volume
  1. select * from SYS.M_VOLUME_FILES WHERE FILE_TYPE = 'DATA'
  2. ALTER SYSTEM RECLAIM DATAVOLUME 120 DEFRAGMENT;=>Our final data volume size will be payload + 20% fragmented space =>Can be used normally.
How to reclaim fragmented space at OS level from HANA Data volume
  1. select * from SYS.M_VOLUME_FILES WHERE FILE_TYPE = 'DATA'
  2. ALTER SYSTEM RECLAIM DATAVOLUME 120 DEFRAGMENT;=>Our final data volume size will be payload + 20% fragmented space =>Can be used normally.

How do I run HANACleaner?

HANACleaner -For automated cleanup of HANA DB:

If you are looking for HANA 2.0, it will be almost same with minor changes.So please refer the document that comes with the installation in the above link in that case. From the github link copy the file hanacleaner.py and transfer it to the target server.

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How do I delete a Hana log file?

Procedure
  1. In SAP HANA studio, choose Backup and Recovery Open Backup Console .
  2. In the Backup Console, go to the Backup Catalog tab.
  3. Select a data backup and right-click to open the context menu. …
  4. Specify what you want to delete: …
  5. Choose Next and review the information about the data backup(s) that will be deleted.
Procedure
  1. In SAP HANA studio, choose Backup and Recovery Open Backup Console .
  2. In the Backup Console, go to the Backup Catalog tab.
  3. Select a data backup and right-click to open the context menu. …
  4. Specify what you want to delete: …
  5. Choose Next and review the information about the data backup(s) that will be deleted.

Why Hana log is full?

Whenever we notice, that the HANA database does not accept any of the new requests to perform it is confirm that the log volume is full for that database. In such cases we need to truncate or shrink or reclaim the unused space on log volume for HANA db.

How do I turn off Hana logs?

For more information, see Database Configuration in SAP HANA Cockpit . Open the change dialog. Specify whether to enable or disable automatic log backups. The default setting is yes (automatic log backup is active).

Can we delete trace files in hana?

There is the ALTER SYSTEM CLEAR TRACES – SAP HANA SQL and System Views Reference – SAP Library command, that allows the clearing/deletion of trace files from the SQL command.

What is hana trace file?

SAP HANA Studio Trace Configuration

SAP HANA Studio provides a graphical user interface for enabling and configuring a number of the most common and important traces.

What is Hana cleaner?

The SAP HANA cleaner is a house keeping script for SAP HANA. It can be used to clean the backup catalog, diagnostic files, alerts, to compress the backup logs, and much more. It should be executed by adm or, in case you use a CRON job, with the same environment as the adm.

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What is log segment in Hana?

The database manages its transaction log in so called log segments, as the linked article describes. A log segment is a file of a configuration-defined size (default: 1 GB) which holds the transactions in a range of transaction numbers. All segments together make up the log area.

How do I clean up Hana logs?

  1. stop the database.
  2. move few of the log segments to new location and create the soft link.
  3. start the database.
  4. check the status of the log segments.
  5. select status from m_log_segments.
  6. if the status of the log segments is ‘free’ then execute ‘alter system reclaim log’ to clear the space.
  1. stop the database.
  2. move few of the log segments to new location and create the soft link.
  3. start the database.
  4. check the status of the log segments.
  5. select status from m_log_segments.
  6. if the status of the log segments is ‘free’ then execute ‘alter system reclaim log’ to clear the space.

How do I disable Hana log backup?

For more information, see Database Configuration in SAP HANA Cockpit . Open the change dialog. Specify whether to enable or disable automatic log backups. The default setting is yes (automatic log backup is active).

How do I trigger a log backup in SAP HANA?

FORCING LOG BACKUPS IN HANA: As we all know data backups in HANA can be triggered from studio or SQL any time and log backups are generally configured to run after every configured time in backup console, there is also an option to force log backup from hdbcons .

How do I use Hdbcons?

How to use SAP HANA hdbcons utility
  1. For example,
  2. 1) To get threads list,
  3. hdbcons “context list -s” > thread_callstack_test.txt.
  4. 2) To generate runtime dump (see the Note 1813020 – How to generate a runtime dump on SAP HANA)
  5. hdbcons “runtimedump dump -f /test/rte_dump.txt”
How to use SAP HANA hdbcons utility
  1. For example,
  2. 1) To get threads list,
  3. hdbcons “context list -s” > thread_callstack_test.txt.
  4. 2) To generate runtime dump (see the Note 1813020 – How to generate a runtime dump on SAP HANA)
  5. hdbcons “runtimedump dump -f /test/rte_dump.txt”

How do I delete a log in SAP HANA?

Procedure
  1. In SAP HANA studio, choose Backup and Recovery Open Backup Console .
  2. In the Backup Console, go to the Backup Catalog tab.
  3. Select a data backup and right-click to open the context menu. …
  4. Specify what you want to delete: …
  5. Choose Next and review the information about the data backup(s) that will be deleted.
Procedure
  1. In SAP HANA studio, choose Backup and Recovery Open Backup Console .
  2. In the Backup Console, go to the Backup Catalog tab.
  3. Select a data backup and right-click to open the context menu. …
  4. Specify what you want to delete: …
  5. Choose Next and review the information about the data backup(s) that will be deleted.

What is log backup in sap?

During a log backup, only the actual data (the “payload”) of the log segments for each service with persistence is written from the log area to service-specific log backups in the file system or to a third-party backup tool. After a system failure, you may need log backups to recover the database to the desired state.

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How do I uninstall Backint agent?

Uninstalling Backint Agent
  1. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hw-backint-agent directory and all files in it.
  2. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hdbconfig directory and all files in it.
  3. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hdbbackint file.
Uninstalling Backint Agent
  1. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hw-backint-agent directory and all files in it.
  2. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hdbconfig directory and all files in it.
  3. Delete the /usr/sap/{SID}/SYS/global/hdb/opt/hdbbackint file.

Where is DB log in Hana?

The log files are available in HANA system and can be accessed via HANA studio on Diagnosis files page under Administrator editor.

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