MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/01/01 through 07/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 183,074 10,058,013
MED90 36,205 680,256
MED85 27,205 263,972
MED80 23,753 140,158
MED75 21,921 97,966
MED66 22,368 100,026
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,033 224,157
2-4 a.m. 3,844 125,150
4-6 a.m. 1,151 70,092
6-8 a.m. 4,739 169,429
8-10 a.m. 23,385 818,190
10-12 a.m. 56,073 1,932,466
12-2 p.m. 55,425 2,015,519
2-4 p.m. 68,086 2,431,995
4-6 p.m. 52,724 1,892,973
6-8 p.m. 22,504 817,365
8-10 p.m. 11,794 498,338
10-12 p.m. 7,768 344,717
__________ _____________ _________________
Total: 314,526 11,340,391
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 2,150
Davis 2,424
Irvine 1,432
Los Angeles 3,226
Riverside 305
San Diego 1,909
San Francisco 4,667
Santa Barbara 758
Santa Cruz 45
Lawrence Berkeley 450
Lawrence Livermore 40
Los Alamos 22
MELWEB 756
Searchlight 23,089
Other - UC 271,164
Other-Network UC 2,089
_____
314,526
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 25,636
Davis 29,209
Irvine 16,266
Los Angeles 44,519
Riverside 1,431
San Diego 89,123
San Francisco 43,307
Santa Barbara 12,422
Santa Cruz 933
Lawrence Berkeley 9,081
Lawrence Livermore 1,630
Los Alamos 230
MELWEB 0
Searchlight 0
Other - UC 11,050,779
Other-Network UC 15,825
_____
11,340,391
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:34
Average session length (minutes:seconds) 20:10
Longest session recorded (minutes:seconds) 292:36
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 492.9
Retrievals per search - standard deviation 5878.1
Percent of searches completed with 0 results 32.7%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 314,526 12.4%
PRESENT 2,080,537 82.3%
INIT or CLOSE 131,892 5.2%
OTHER 1,290 0.1%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 21,678 4.9% 8,501 39.2% 4 906.2 5003.6
PERSONAL AUTHOR 101754 23.1% 29,483 29.0% 7 82.9 843.6
TITLE WORD 39,925 9.0% 15,369 38.5% 3 160.7 1841.6
SUBSET 560 0.1% 101 18.0% 18 223.1 953.0
SUBJECT WORD 513 0.1% 194 37.8% 12 1382.3 10142.9
SUBJECT 7,850 1.8% 3,851 49.1% 19 540.0 3424.0
EXACT SUBJECT 16,526 3.7% 3,968 24.0% 28 561.3 4015.3
MAJOR SUBJECT 596 0.1% 184 30.9% 17 352.3 1860.9
EXACT MAJOR SUBJ 1,615 0.4% 309 19.1% 18 208.7 659.6
EXACT TITLE 3,079 0.7% 1,892 61.4% 1 20.7 172.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,238 1.0% 1,242 29.3% 402 1818.4 3614.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 105 0.0% 68 64.8% 13 100.1 335.3
KEYWORD 177293 40.2% 60,154 33.9% 16 1057.9 9317.8
DATE 8,119 1.8% 1,783 22.0% 6 168.5 1614.0
LANGUAGE 22,736 5.2% 6,091 26.8% 24 435.1 3836.2
UNIQUE ID 576 0.1% 247 42.9% 1 1.3 1.5
ADDED 4,987 1.1% 2,197 44.1% 5 22.0 176.9
PUB TYPE 11,284 2.6% 2,725 24.1% 23 171.0 1040.2
AUTHOR AFFIL. 2,800 0.6% 1,218 43.5% 9 99.6 810.8
CHEMICAL NAME 55 0.0% 21 38.2% 1,281 733.6 626.6
EXACT CHEMICAL 7 0.0% 6 85.7% 116 116.0 0.0
AT 12,462 2.8% 3,950 31.7% 17 727.8 6617.0
AGE 748 0.2% 200 26.7% 27 179.1 540.7
ISN 7 0.0% 7 100% 0 0.0 0.0
ARTICLE 358 0.1% 69 19.3% 48 386.4 966.1
XXS 821 0.2% 295 35.9% 16 257.5 2239.7
XMXS 459 0.1% 185 40.3% 16 102.1 368.6
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 113 0.0% 89 78.8% 21 785.0 1644.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 89,434 28.4% 30,409 34.0% 6 263.8 3348.1
Single 225,092 71.6% 72,529 32.2% 16 914.0 8156.8
PRESENT commands, by type:
MARC 31.1%
OPAC 29.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS