MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 06/23/01 through 06/29/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 37,657 1,864,204
MED90 7,440 133,520
MED85 5,607 53,457
MED80 4,941 30,367
MED75 4,537 17,941
MED66 4,602 21,951
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,694 46,350
2-4 a.m. 774 20,397
4-6 a.m. 191 14,442
6-8 a.m. 888 25,282
8-10 a.m. 5,120 164,110
10-12 a.m. 12,518 371,347
12-2 p.m. 11,892 367,783
2-4 p.m. 13,791 442,307
4-6 p.m. 10,017 362,829
6-8 p.m. 4,235 159,102
8-10 p.m. 1,871 87,670
10-12 p.m. 1,793 59,821
__________ _____________ _________________
Total: 64,784 2,121,440
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 560
Davis 513
Irvine 247
Los Angeles 319
Riverside 48
San Diego 650
San Francisco 1,438
Santa Barbara 60
Santa Cruz 16
Lawrence Berkeley 109
Lawrence Livermore 7
Los Alamos 34
MELWEB 222
Searchlight 5,589
Other - UC 54,636
Other-Network UC 336
_____
64,784
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 5,657
Davis 5,886
Irvine 9,964
Los Angeles 3,736
Riverside 174
San Diego 7,307
San Francisco 15,504
Santa Barbara 941
Santa Cruz 382
Lawrence Berkeley 2,158
Lawrence Livermore 3,162
Los Alamos 5,236
MELWEB 618
Searchlight 0
Other - UC 2,056,937
Other-Network UC 3,778
_____
2,121,440
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
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 0.8
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:18
Average session length (minutes:seconds) 19:13
Longest session recorded (minutes:seconds) 267:35
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 424.8
Retrievals per search - standard deviation 5221.1
Percent of searches completed with 0 results 32.4%
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 64,784 13.1%
PRESENT 403,381 81.4%
INIT or CLOSE 27,108 5.5%
OTHER 271 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 4,385 4.9% 1,675 38.2% 4 837.3 3782.2
PERSONAL AUTHOR 21,701 24.4% 5,705 26.3% 7 83.8 805.8
TITLE WORD 7,275 8.2% 2,442 33.6% 3 225.6 2896.0
SUBSET 131 0.1% 35 26.7% 38 613.8 1592.2
SUBJECT WORD 85 0.1% 45 52.9% 23 1037.5 4513.6
SUBJECT 1,403 1.6% 654 46.6% 15 569.6 3248.2
EXACT SUBJECT 2,643 3.0% 540 20.4% 26 677.3 5675.3
MAJOR SUBJECT 88 0.1% 28 31.8% 9 595.5 2340.2
EXACT MAJOR SUBJ 260 0.3% 50 19.2% 36 287.5 804.2
EXACT TITLE 748 0.8% 443 59.2% 1 5.0 18.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,762 2.0% 897 50.9% 227 1251.9 2744.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 23 0.0% 9 39.1% 16 39.0 75.5
KEYWORD 35,491 39.8% 12,030 33.9% 16 885.2 8304.9
DATE 1,933 2.2% 406 21.0% 6 56.8 305.6
LANGUAGE 3,414 3.8% 726 21.3% 25 368.4 3108.5
UNIQUE ID 214 0.2% 101 47.2% 1 1.0 0.0
ADDED 1,139 1.3% 521 45.7% 4 15.5 34.8
PUB TYPE 2,131 2.4% 420 19.7% 26 184.0 604.4
AUTHOR AFFIL. 593 0.7% 291 49.1% 8 63.6 576.1
CHEMICAL NAME 4 0.0% 0 0.0% 3,478 3475.8 4001.3
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,315 3.7% 1,535 46.3% 25 605.8 3775.8
AGE 126 0.1% 29 23.0% 18 132.5 321.6
ISN 7 0.0% 7 100% 0 0.0 0.0
ARTICLE 48 0.1% 7 14.6% 69 550.0 1363.4
XXS 91 0.1% 33 36.3% 57 453.4 1275.2
XMXS 54 0.1% 14 25.9% 15 132.5 368.8
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 24 0.0% 18 75.0% 289 342.0 222.4
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 18,090 27.9% 6,129 33.9% 6 219.5 2366.7
Single 46,694 72.1% 14,859 31.8% 15 781.9 7287.5
PRESENT commands, by type:
MARC 30.1%
OPAC 32.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS