{
    "info": {
        "author": "Chrysostomos Nanakos",
        "author_email": "chris@include.gr",
        "bugtrack_url": null,
        "classifiers": [
            "Environment :: Console",
            "Intended Audience :: Developers",
            "Intended Audience :: System Administrators",
            "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
            "Operating System :: POSIX :: Linux",
            "Topic :: Utilities"
        ],
        "description": "pgpagecache\n===========\n\npgpagecache is a Python script, showing PostgreSQL objects resident in memory.\nPostgreSQL relies on OS file system cache to keep performance high and it is\npretty common not to see gains in performance for buffer cache size over about\na specific limit.\nSince the OS buffer cache keeps file buffers in memory as well, there are\nlots of database objects in PostgreSQL cache, OS cache, or both. This is called\ndouble buffering.\n\nIf someone wants to examine the PostgreSQL cache, he/she can use the contrib\nmodule pg_buffercache to map each object with it's memory footprint in cache.\nBut, if one wanted to examine the entire cache picture, including OS cache,\nhe/she has to determine whether PostgreSQL object pages are resident in memory,\nfor this purpose one can use pgpagecache.\n\n\nRequired Extension\n------------------\n\nFor the PostgreSQL buffercache usage the pg_buffercache extension is needed.\nYou can install it from the contrib modules by simply executing the command\nbelow:\n\n::\n\n    postgres=# CREATE EXTENSION pg_buffercache;\n    CREATE EXTENSION\n\nExample\n-------\n\n::\n\n  $ pgpagecache -u postgres -p apassword -d postgres -H localhost -P 5432 \\\n    -b /var/lib/postgresql/9.3/main/base\n    PageCache Usage\n    ---------------\n\n    DB Name    Table                    Cached Pages    Total Pages    Ratio (%)    Bytes\n    ---------  ---------------------  --------------  -------------  -----------  -------\n    postgres   pgbench_accounts_pkey             552            552          100  2260992\n    postgres   pgbench_tellers                    18             18          100    73728\n    postgres   pgbench_tellers_pkey                4              4          100    16384\n    postgres   pgbench_branches                   12             12          100    49152\n    postgres   pgbench_branches_pkey               4              4          100    16384\n\n    PostgreSQL BufferCache Usage\n    -----------------------------\n\n    DB Name    Table                                         Bytes\n    ---------  ---------------------------------  ----------------\n    postgres   pgbench_accounts                        1.38854e+07\n    postgres   pgbench_accounts_pkey                   2.2528e+06\n    postgres   pgbench_history                    188416\n    postgres   pg_statistic                       122880\n    postgres   pg_operator                        106496\n    postgres   pgbench_tellers                    106496\n    postgres   pg_depend_reference_index           98304\n    postgres   pg_depend                           81920\n    postgres   pgbench_branches                    81920\n    ...",
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        "keywords": "PostgreSQL postgres pagecache linux cache buffercache buffer memory",
        "license": "GPL",
        "maintainer": null,
        "maintainer_email": null,
        "name": "pgpagecache",
        "package_url": "https://pypi.org/project/pgpagecache/",
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        "release_url": "https://pypi.org/project/pgpagecache/0.1/",
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        "summary": "PostgreSQL objects resident in OS memory",
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