MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/03/00 through 06/09/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 44,538 1,978,214
MED90 10,262 160,559
MED85 7,542 68,228
MED80 6,603 35,590
MED75 6,184 27,577
MED66 6,228 29,031
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,876 46,585
2-4 a.m. 1,407 12,580
4-6 a.m. 427 9,734
6-8 a.m. 1,026 28,376
8-10 a.m. 5,371 174,249
10-12 a.m. 12,450 415,294
12-2 p.m. 14,489 401,279
2-4 p.m. 16,826 461,201
4-6 p.m. 12,799 351,003
6-8 p.m. 6,358 182,474
8-10 p.m. 4,952 127,887
10-12 p.m. 3,376 88,537
__________ _____________ _________________
Total: 81,357 2,299,199
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 499
Davis 1,042
Irvine 101
Los Angeles 814
Riverside 32
San Diego 1,112
San Francisco 1,559
Santa Barbara 42
Santa Cruz 107
Lawrence Berkeley 55
Lawrence Livermore 5
Los Alamos 1
MELWEB 67,453
Searchlight 7,748
Other - UC 37
Other-Network UC 750
_____
81,357
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,157
Davis 13,038
Irvine 254
Los Angeles 8,534
Riverside 147
San Diego 6,307
San Francisco 17,321
Santa Barbara 918
Santa Cruz 2,477
Lawrence Berkeley 529
Lawrence Livermore 28
Los Alamos 4
MELWEB 2,224,518
Searchlight 13,323
Other - UC 291
Other-Network UC 6,353
_____
2,299,199
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 3.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.5
Standard deviation in seconds 1.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:49
Average session length (minutes:seconds) 17:00
Longest session recorded (minutes:seconds) 251:24
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 412.4
Retrievals per search - standard deviation 5336.7
Percent of searches completed with 0 results 34.5%
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 81,357 14.8%
PRESENT 432,393 78.5%
INIT or CLOSE 36,898 6.7%
OTHER 227 0.0%
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 5,055 4.4% 1,995 39.5% 4 809.9 3540.7
PERSONAL AUTHOR 24,532 21.4% 7,029 28.7% 7 85.6 851.7
TITLE WORD 7,972 7.0% 2,915 36.6% 3 132.6 1473.4
SUBSET 195 0.2% 57 29.2% 12 205.5 1079.2
SUBJECT WORD 426 0.4% 218 51.2% 11 628.7 3220.6
SUBJECT 2,277 2.0% 1,181 51.9% 17 583.3 2718.1
EXACT SUBJECT 4,435 3.9% 1,323 29.8% 27 545.9 4082.3
MAJOR SUBJECT 103 0.1% 38 36.9% 17 1530.7 7408.7
EXACT MAJOR SUBJ 300 0.3% 57 19.0% 35 194.3 500.4
EXACT TITLE 722 0.6% 408 56.5% 1 17.9 158.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,235 1.1% 525 42.5% 270 1438.4 2805.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 11 0.0% 5 45.5% 9 14.2 20.0
KEYWORD 49,080 42.8% 17,870 36.4% 16 855.6 8357.3
DATE 2,288 2.0% 521 22.8% 6 113.3 969.7
LANGUAGE 6,112 5.3% 1,738 28.4% 22 598.7 5839.3
UNIQUE ID 268 0.2% 50 18.7% 1 1.0 0.1
ADDED 1,138 1.0% 880 77.3% 4 12.9 29.8
PUB TYPE 2,524 2.2% 620 24.6% 24 219.7 2539.3
AUTHOR AFFIL. 683 0.6% 353 51.7% 8 273.3 3113.9
CHEMICAL NAME 17 0.0% 12 70.6% 7 17.4 23.1
EXACT CHEMICAL 5 0.0% 3 60.0% 3 2.5 2.1
AT 4,640 4.0% 1,434 30.9% 23 856.9 6755.5
AGE 172 0.2% 37 21.5% 32 342.9 1472.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 205 0.2% 61 29.8% 18 536.4 2971.4
XXS 96 0.1% 41 42.7% 7 103.4 410.8
XMXS 83 0.1% 47 56.6% 9 148.1 426.8
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 20 0.0% 6 30.0% 52 214.8 463.9
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 22,177 27.3% 7,826 35.3% 7 315.9 3456.3
Single 59,180 72.7% 20,258 34.2% 15 745.6 7408.8
PRESENT commands, by type:
MARC 35.7%
OPAC 27.5%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS