MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 03/01/00 through 03/31/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 201,029 10,758,923
MED90 45,499 968,148
MED85 33,038 338,729
MED80 28,615 180,758
MED75 26,288 114,455
MED66 26,851 131,060
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 7,792 268,919
2-4 a.m. 3,563 145,046
4-6 a.m. 1,042 37,852
6-8 a.m. 4,915 143,977
8-10 a.m. 26,112 920,475
10-12 a.m. 56,589 1,983,579
12-2 p.m. 63,493 2,128,837
2-4 p.m. 76,524 2,513,411
4-6 p.m. 56,726 2,041,697
6-8 p.m. 29,784 1,065,421
8-10 p.m. 20,904 716,592
10-12 p.m. 13,876 526,267
__________ _____________ _________________
Total: 361,320 12,492,073
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 2,439
Davis 2,499
Irvine 388
Los Angeles 3,826
Riverside 434
San Diego 4,505
San Francisco 5,179
Santa Barbara 190
Santa Cruz 358
Lawrence Berkeley 448
Lawrence Livermore 199
Los Alamos 0
MELWEB 328,342
Searchlight 8,700
Other - UC 510
Other-Network UC 3,303
_____
361,320
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 27,339
Davis 30,858
Irvine 5,087
Los Angeles 29,955
Riverside 2,781
San Diego 45,915
San Francisco 59,261
Santa Barbara 2,090
Santa Cruz 2,959
Lawrence Berkeley 4,286
Lawrence Livermore 2,132
Los Alamos 0
MELWEB 12,020,087
Searchlight 228,058
Other - UC 1,526
Other-Network UC 29,739
_____
12,492,073
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.9
Standard deviation in seconds 3.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 0.9
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:10
Average session length (minutes:seconds) 18:21
Longest session recorded (minutes:seconds) 290:36
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 438.1
Retrievals per search - standard deviation 4906.9
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 361,320 13.2%
PRESENT 2,216,282 81.0%
INIT or CLOSE 153,511 5.6%
OTHER 4,388 0.2%
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 22,902 4.4% 8,720 38.1% 4 773.2 4125.5
PERSONAL AUTHOR 106910 20.4% 28,425 26.6% 7 80.2 943.0
TITLE WORD 36,182 6.9% 12,955 35.8% 3 130.1 1519.4
SUBSET 811 0.2% 163 20.1% 27 352.6 1695.9
SUBJECT WORD 1,529 0.3% 759 49.6% 8 1849.9 16273.0
SUBJECT 10,954 2.1% 5,749 52.5% 21 682.9 4732.5
EXACT SUBJECT 22,846 4.4% 6,429 28.1% 31 546.2 3911.9
MAJOR SUBJECT 846 0.2% 314 37.1% 20 357.3 1658.2
EXACT MAJOR SUBJ 2,103 0.4% 403 19.2% 24 267.0 1059.5
EXACT TITLE 3,586 0.7% 1,952 54.4% 1 33.3 805.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 6,108 1.2% 2,166 35.5% 134 1254.3 2847.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 125 0.0% 42 33.6% 19 1952.1 14678.3
KEYWORD 214186 40.9% 72,818 34.0% 18 886.3 7272.3
DATE 10,028 1.9% 2,174 21.7% 4 94.1 694.5
LANGUAGE 31,612 6.0% 9,140 28.9% 26 419.8 3221.3
UNIQUE ID 1,074 0.2% 185 17.2% 1 1.1 0.7
ADDED 4,491 0.9% 2,752 61.3% 7 33.2 459.1
PUB TYPE 12,676 2.4% 3,015 23.8% 21 171.5 1854.6
AUTHOR AFFIL. 3,191 0.6% 1,425 44.7% 10 789.2 15587.7
CHEMICAL NAME 33 0.0% 24 72.7% 8 2092.1 6162.1
EXACT CHEMICAL 18 0.0% 12 66.7% 24 51.8 81.1
AT 27,977 5.3% 9,187 32.8% 21 562.7 3904.9
AGE 1,014 0.2% 277 27.3% 20 144.7 718.3
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 549 0.1% 129 23.5% 39 726.8 8693.4
XXS 773 0.1% 376 48.6% 17 305.0 2019.9
XMXS 395 0.1% 196 49.6% 16 589.1 2555.6
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 91 0.0% 53 58.2% 32 396.4 913.7
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 105,291 29.1% 35,101 33.3% 8 287.5 2904.1
Single 256,029 70.9% 82,111 32.1% 16 794.1 6808.3
PRESENT commands, by type:
MARC 33.9%
OPAC 28.0%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS