PostgreSQL Performance From the Ground Up

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Operating System, Cont. ● Benchmarking will show if <strong>the</strong> readahead needs adjusted. ● blockdev --setra 4096 /dev/sda. Put this in rc.local to make sure it's set on reboot. ● Use noatime to disable file access times ● vm.swappiness = 0 – Shrink filesystem cache instead of swapping ● vm.overcommit_memory = 2 – Disable OOMKiller
Operating System, Cont. ● vm.dirty_ratio = 10 and vm.dirty_background_ratio = 5 (if not set already) – Smooths out syncs of memory to disk ● Schedulers: noop good for SAN/RAID with a lot of cache. Deadline – not always <strong>the</strong> best, be sure to test cfq – if in doubt, use this. Most tested, and widely used.
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: Operating System, Cont. ● Ext3 da
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 and 28: PostgreSQL, Cont. ● effective_io_
Page 29 and 30: PostgreSQL, Cont. ● checkpoint_ti
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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