PostgreSQL Performance From the Ground Up

Recommendations

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PostgreSQL, cont. ● Autovacuum running out of memory. ● Reduce allocation of maintenance_work_mem or max_autovacuum_workers ● Autovacuum is too disruptive ● Increase the autovacuum_vacuum_cost_delay ~100ms is generally ok.
PostgreSQL, Cont. ● Autovacuum is not keeping up. ● Decrease autovacuum_vacuum_cost_delay. Between 1ms and 5ms. ● Increase autovacuum_cost_limit after that. ● If bloat is too high (~20% or more dead tuples), CLUSTER and REINDEX to reduce space and increase performance. Will cause downtime, though. =(
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 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: PostgreSQL, Cont. ● Autovacuum Co
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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