PostgreSQL Performance From the Ground Up

Recommendations

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PostgreSQL, Cont ● checkpoint_segments = 10 ● Controls the number of WAL files. Can increase recovery time. ● Don't increase over 32 unless you have a highvelocity database. ● checkpoint_completion_target = 0.9 ● Smooth out checkpoint IO, steady and flat, no spikes.
PostgreSQL, Cont. ● checkpoint_timeout = 5min ● Generally ok if you change other values. ● Ok to increase if you find a lot of checkpoints in your log. Use log_checkpoints parameter in the postgresql.conf ● wal_buffers = 16MB ● wal_sync_method – Generally don't have to change this. PostgreSQL and the OS determine the best one at initdb time.
Page 1 and 2: PostgreSQL Performance From the Gro
Page 3 and 4: Choosing Hardware ● These are nic
Page 5 and 6: Hardware Basics: Memory ● Rule of
Page 7 and 8: Hardware Basics: Memory, Cont Funct
Page 9 and 10: Hardware Basics: Disks, cont. ● R
Page 11 and 12: Hardware Basics: Disks, Cont Rotati
Page 13 and 14: ● dd Hardware Basics: Disks, Cont
Page 15 and 16: Operating System, Cont. ● Ext3 da
Page 17 and 18: Operating System, Cont. ● vm.dirt
Page 19 and 20: Operating System, Cont. ● Use tab
Page 21 and 22: PostgreSQL ● shared_buffers make
Page 23 and 24: ● effective_cache_size ● 50-75%
Page 25 and 26: ● max_connections = 100 PostgreSQ
Page 27: PostgreSQL, Cont. ● effective_io_
Page 31 and 32: ● Don't change these: PostgreSQL,
Page 33 and 34: PostgreSQL, Cont. ● Autovacuum Co
Page 35 and 36: PostgreSQL, Cont. ● Autovacuum is
Page 37 and 38: ● log_rotation_age = 1d ● log_r
Page 39 and 40: Queries, Cont. lacey@[local]:5432:l
Page 41 and 42: Queries, Cont. ● Biggest query is

PostgreSQL Performance From the Ground Up

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