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php - PHP 的 Postgres 连接速度很慢

转载 作者:可可西里 更新时间:2023-11-01 00:52:54 27 4
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我在使用 php 连接 Postgres 服务器时遇到了一些问题。我刚开始使用 Postgres + PHP 组合,我意识到连接建立真的很慢。
建立一个简单的连接通常需要 1 秒,有时甚至超过 2 秒。而且它只是一个开发服务器,所以没有真正的流量。好吧,服务器不是最好的,但 MySQL 连接要快得多。

连接后,一切顺利,每个查询都按我预期的方式运行。应用程序运行时间约为 10%,连接约为 90%。真的很奇怪,因为有了 mysql 数据库层,它真的很快。

可能是什么问题?

我尝试过使用 PDO、pg_pconnect、pg_connect,但每次结果都是一样的。

这可能是 Postgres 配置错误?但是查询运行得很快,只有连接建立很慢。我不知道。

PG:PostgreSQL 8.3.9
PHP:5.2.6

提前致谢!

配置:

#------------------------------------------------------------------------------
# CONNECTIONS AND AUTHENTICATION
#------------------------------------------------------------------------------

# - Connection Settings -

#listen_addresses = 'localhost' # what IP address(es) to listen on;
# comma-separated list of addresses;
# defaults to 'localhost', '*' = all
# (change requires restart)
port = 5432 # (change requires restart)
max_connections = 100 # (change requires restart)
# Note: Increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction). You might
# also need to raise shared_buffers to support more connections.
#superuser_reserved_connections = 3 # (change requires restart)
unix_socket_directory = '/var/run/postgresql' # (change requires restart)
#unix_socket_group = '' # (change requires restart)
#unix_socket_permissions = 0777 # begin with 0 to use octal notation
# (change requires restart)
#bonjour_name = '' # defaults to the computer name
# (change requires restart)

# - Security and Authentication -

#authentication_timeout = 1min # 1s-600s
ssl = true # (change requires restart)
#ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' # allowed SSL ciphers
# (change requires restart)
#password_encryption = on
#db_user_namespace = off

# Kerberos and GSSAPI
#krb_server_keyfile = '' # (change requires restart)
#krb_srvname = 'postgres' # (change requires restart, Kerberos only)
#krb_server_hostname = '' # empty string matches any keytab entry
# (change requires restart, Kerberos only)
#krb_caseins_users = off # (change requires restart)
#krb_realm = '' # (change requires restart)

# - TCP Keepalives -
# see "man 7 tcp" for details

#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
# 0 selects the system default
#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
# 0 selects the system default
#tcp_keepalives_count = 0 # TCP_KEEPCNT;
# 0 selects the system default


#------------------------------------------------------------------------------
# RESOURCE USAGE (except WAL)
#------------------------------------------------------------------------------

# - Memory -

shared_buffers = 24MB # min 128kB or max_connections*16kB
# (change requires restart)
#temp_buffers = 8MB # min 800kB
#max_prepared_transactions = 5 # can be 0 or more
# (change requires restart)
# Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory
# per transaction slot, plus lock space (see max_locks_per_transaction).
#work_mem = 1MB # min 64kB
#maintenance_work_mem = 16MB # min 1MB
#max_stack_depth = 2MB # min 100kB

# - Free Space Map -

max_fsm_pages = 153600 # min max_fsm_relations*16, 6 bytes each
# (change requires restart)
#max_fsm_relations = 1000 # min 100, ~70 bytes each
# (change requires restart)

# - Kernel Resource Usage -

#max_files_per_process = 1000 # min 25
# (change requires restart)
#shared_preload_libraries = '' # (change requires restart)

# - Cost-Based Vacuum Delay -

#vacuum_cost_delay = 0 # 0-1000 milliseconds
#vacuum_cost_page_hit = 1 # 0-10000 credits
#vacuum_cost_page_miss = 10 # 0-10000 credits
#vacuum_cost_page_dirty = 20 # 0-10000 credits
#vacuum_cost_limit = 200 # 1-10000 credits

# - Background Writer -

#bgwriter_delay = 200ms # 10-10000ms between rounds
#bgwriter_lru_maxpages = 100 # 0-1000 max buffers written/round
#bgwriter_lru_multiplier = 2.0 # 0-10.0 multipler on buffers scanned/round

最佳答案

如果不使用 SSL,请始终将其关闭。如果您想使用 SSL,请确保 pg_hba.conf 具有正确的设置以要求安全连接。

关于php - PHP 的 Postgres 连接速度很慢,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3360184/

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