Apache and PHP-FPM with MPM Event

[SPDTeam]

Hi all

I'm after some advice tuning Apache and PHP-FPM while using Event MPM module.

Most guides I've read are assuming MPM Prefork, but there does appear to be some differences and are often contradictory. I've tried following a number and have produced the following settings:

Apache Global Config

• Start Servers: 3
• Min Spare Servers: 3
• Max Spare Servers: 16
• Server Limit: 16
• Max Request Workers: 400
• Max Connections per Child: 10000
• Keep -Alive: on
• Keep-Alive Timeout: 5
• Max Keep-Alive Request: Unlimited
• Timeout: 60

PHP-FPM

• Max Request: 20
• Max Children: 15
• Process Idle Timeout: 10

Server Usage

The server is primarily used to host WordPress sites. Current count is about 90sites , majority low traffic. A number have PHP-FPM enabled, but not all at this point.

Server Spec

Server is 16 Core and 16 GB RAM. "/proc/cpuinfo" produces the following info...

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 2
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 3
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 4
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 5
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 6
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 7
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 8
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 9
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 10
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 11
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 12
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 13
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 14
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

processor       : 15
vendor_id       : GenuineIntel
cpu family      : 6
model           : 63
model name      : Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz
stepping        : 2
microcode       : 0x43
cpu MHz         : 2299.998
cache size      : 25600 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 sep mca cmov pat clflush mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm intel_ppin ssbd ibrs ibpb stibp fsgsbase bmi1 avx2 bmi2 erms xsaveopt spec_ctrl intel_stibp
bogomips        : 4599.99
clflush size    : 64
cache_alignment : 64
address sizes   : 46 bits physical, 48 bits virtual
power management:

Any advice would be an immense help. Thanks.

 

[cPRex]

Hey there! Since you have access to the server, you are really the best resource for additional tuning as you can change values and see how the system reacts. Any numbers that anyone else proposes would just be guesses, no matter how educated they may be.