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   pmdazswap    ( 1 )

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Имя (Name)

pmdazswap - zswap (compressed swap) PMDA

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Описание (Description)

pmdazswap is a Performance Metrics Domain Agent (PMDA) which
       exports metric values about compressed swap operation, as tracked
       by the zswap Linux kernel module.

       Zswap is a lightweight compressed cache for swap pages.  It takes
       pages that are in the process of being swapped out and attempts
       to compress them into a dynamically allocated RAM-based memory
       pool.  Zswap trades CPU cycles for potentially reduced swap I/O.
       This tradeoff can also result in a performance improvement if
       reads from the compressed cache are faster than reads from a swap
       device.

       This PMDA exports metrics about pool size, number of pages
       stored, and various counters for the reasons pages are rejected.

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Установка (Installation)

Install the zswap PMDA by using the Install script as root:

           # cd $PCP_PMDAS_DIR/zswap
           # ./Install

       To uninstall, do the following as root:

           # cd $PCP_PMDAS_DIR/zswap
           # ./Remove

       pmdazswap is launched by pmcd(1) and should never be executed
       directly. The Install and Remove scripts notify pmcd(1) when the
       agent is installed or removed.

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Файлы (Files)

$PCP_PMDAS_DIR/zswap/Install
           installation script for the pmdazswap agent

       $PCP_PMDAS_DIR/zswap/Remove
           undo installation script for the pmdazswap agent

       $PCP_LOG_DIR/pmcd/zswap.log
           default log file for error messages from pmdazswap

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Окружение PCP (PCP environment)

Environment variables with the prefix PCP_ are used to
       parameterize the file and directory names used by PCP. On each
       installation, the file /etc/pcp.conf contains the local values
       for these variables.  The $PCP_CONF variable may be used to
       specify an alternative configuration file, as described in
       pcp.conf(5).

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Смотри также (See also)

PCPIntro(1) and pmcd(1).

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