add 'stat auth' to report authn/authz cache sizing

[mohitkhullar]

/plugin-branch auth_cache_stats

[roborivers]

Cbuild submission: Error ⚠.
Regression testing: Success ✓.

The first 10 failing tests are:
sc_resume_logicalsc_generated **quarantined**
cldeadlock
reco-ddlk-sql **quarantined**
consumer_non_atomic_default_consumer_generated **quarantined**
sys_cmd_access
fdb_compat_rte_connect_generated
sc_downgrade [timeout] **quarantined**

[roborivers]

Cbuild submission: Error ⚠.
Regression testing: Success ✓.

The first 10 failing tests are:
sp_snapshot_generated
noresetgen
consumer_non_atomic_default_consumer_generated **quarantined**
sc_downgrade [timeout] **quarantined**
reco-ddlk-sql [timeout] **quarantined**

[roborivers]

Cbuild submission: Success ✓.
Regression testing: Success ✓.

The first 10 failing tests are:
consumer_non_atomic_default_consumer_generated **quarantined**
sc_downgrade [timeout] **quarantined**
reco-ddlk-sql [timeout] **quarantined**

[mohitkhullar]

auth authn cache: size=500/500 lookups=4032 hits=2018 misses=2014 hit_ratio=50.0% evicted=1514 aged_out=0 pushed_before_ageout=1514 pushed=100.0%
auth authz cache: size=2000/2000 lookups=4051 hits=16 misses=4035 hit_ratio=0.4% evicted=2035 aged_out=0 pushed_before_ageout=2035 pushed=100.0%

^ new task for each query ^

[mohitkhullar]

adding a query with sleep(600) in same session of cdb2sql
LONG REQUEST (600035 ms) finished (see /bb/data/mohitdb1.longreqs for details)
auth authn cache: size=500/500 lookups=4043 hits=2025 misses=2018 hit_ratio=50.1% evicted=1518 aged_out=2 pushed_before_ageout=1516 pushed=99.9%
auth authz cache: size=2000/2000 lookups=4077 hits=29 misses=4048 hit_ratio=0.7% evicted=2046 aged_out=11 pushed_before_ageout=2035 pushed=99.5%

[mohitkhullar]

Thanks